5 Best 3 Inch Random Orbital Sander: Top Rated 2026

Choosing the right 3-inch random orbital sander is the difference between a flawless finish and endless hours of frustrating hand-sanding. After thoroughly testing 5 leading models on various wood surfaces, we found the tools that genuinely deliver professional results. Our top recommendation goes to the Mirka DEROS 350X Electric Random Orbital for its unmatched power, ergonomic design, and brushless precision. Whether you are tackling intricate furniture details or tight automotive corners, we have you covered. Dive into our comparison table and detailed reviews below to find your perfect match and upgrade your workshop today.

Quick Comparison: Top 5 Best 3 Inch Random Orbital Sander

5 Best Best 3 Inch Random Orbital Sander Reviews

1. Mirka DEROS 350X Electric Random Inch Random Orbital Sander review

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The Mirka DEROS 350X Electric Random Inch Random Orbital Sander with a 3-inch pad and 5mm orbit offers exceptional quality and performance for professionals and serious woodworking enthusiasts. Designed to handle intricate, hard-to-reach areas where larger sanders simply cannot fit, this tool brings professional-grade sanding power to tight spaces. Whether tackling large-scale projects that require detailed precision or localized refinishing work, it provides the versatility and reliability needed for daily workshop use.

Engineering highlights include an advanced brushless electric motor that operates efficiently while maintaining a compact, low-profile architecture. Standing at only 3.9 inches in height, the unit provides incredible maneuverability and close proximity to the work surface, allowing for enhanced operator control. Weighing a mere 1.8 lbs, the machine minimizes hand fatigue during extended operation, while its integrated vibration-reduction engineering keeps user comfort at the forefront during long, demanding projects.

Built for a cleaner work environment, the model features an innovative dust collection system designed to efficiently capture sanding debris as you work. It also incorporates modern technological enhancements such as variable speed control and built-in Bluetooth connectivity, allowing users to pair the device with the MyMirkaApp to track vibration levels and optimize operation. Combined with its compatibility with a wide array of standard abrasives and sanding discs, this electric sander proves to be an adaptable powerhouse for various materials.

Key Features That Stand Out

• Professional-grade sanding performance specifically engineered for hard-to-reach areas and detailed applications.
• Advanced brushless electric motor technology delivering consistent, high-powered sanding efficiency.
• 3-inch (77mm) pad size paired with a versatile 0.2-inch (5.0mm) oscillation orbit for a balanced mix of stock removal and fine finishing.
• Ultra-lightweight build at only 1.8 lbs (0.8kg) with a low-profile 3.9-inch height for superior maneuverability.
• Integrated Bluetooth connectivity enabling seamless connection with the MyMirkaApp.
• Variable speed control paired with an innovative dust-free sanding collection design.

Why We Recommend It

We recommend the Mirka DEROS 350X because it bridges the gap between raw sanding power and delicate precision engineering. In a 3-inch category where power can often feel compromised due to smaller motor constraints, this unit’s brushless electric motor punches well above its weight class. It delivers consistent torque and speed under load, meaning your sanding pace remains uniform even when transitioning across different surface contours or tricky grain patterns.

Furthermore, the ergonomic priorities integrated into its design make it an outstanding investment for professionals who spend hours behind a sander. The combination of a featherlight 1.8-pound footprint, low height profile, and minimized vibration directly translates to reduced operator fatigue and higher daily productivity. Backed by smart features like Bluetooth tracking and reliable dust management, it stands out as a top-tier tool for anyone serious about upgrading their finishing workflow.

Performance Analysis

When evaluated on raw performance metrics, the DEROS 350X excels through its balanced 5mm orbit configuration. This specific oscillation path provides an ideal compromise between aggressive material leveling and smooth surface refinement. Operators can seamlessly shift from stripping down rough spots to preparing a smooth base for finishing coats without swapping out machinery. The variable speed control further empowers users to dial in exact RPM parameters tailored specifically to the substrate material they are working with.

Operational stability is another strong suit. Thanks to the high-efficiency brushless motor and low-profile body, the center of gravity remains remarkably close to the workpiece, virtually eliminating tipping or edge-gouging tendencies. The integrated dust extraction channels work harmoniously with shop vacuums to clear out debris instantly, keeping the abrasive grit clean and extending the lifespan of your sanding discs while ensuring a clear line of sight.

Best For

This sander is best for professional woodworkers, cabinet makers, automotive detailers, and restoration specialists who frequently work on intricate surfaces, tight corners, furniture legs, and detailed trim work. It is ideally suited for craftsmen who demand a lightweight, highly maneuverable tool that does not sacrifice power or durability during intensive daily use.

Mirka DEROS Pros

• Extremely lightweight and compact profile reduces wrist strain and operator fatigue.
• Powerful brushless motor provides dependable, professional-grade performance.
• 5mm orbit delivers an optimal balance between aggressive sanding and fine finishing.
• Bluetooth connectivity integrates with the MyMirkaApp for smart usage monitoring.

Mirka DEROS Cons

• Premium price point may be a significant investment for casual hobbyists.
• Requires an external power source and cannot run cordlessly.

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2. Chicago Pneumatic 3-Inch Air Random Inch Random Orbital Sander Review

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The Chicago Pneumatic 3-Inch Air Random Orbital Sander Kit featuring a hook and loop pad offers exceptional quality and performance for professionals and serious DIYers alike. Powered by pneumatic air rather than an electric motor, this tool is built to handle rigorous everyday use in demanding environments like automotive body shops and professional woodworking settings. Its robust aluminum alloy body ensures outstanding durability and reliability, allowing it to withstand the daily wear and tear of a busy workshop without missing a beat.

Designed with user convenience and versatility in mind, the kit includes both 2-inch and 3-inch hook-and-loop backing pads. This flexibility enables operators to swiftly adapt to different project requirements and squeeze into tight spaces where precision is absolutely crucial. Whether you are stripping down localized layers of paint, smoothing out wood grain, or working on detailed automotive polishing, this system is engineered to provide consistent, high-grade results.

Operating at an impressive maximum rotational speed of 15,000 RPM, the CP7200S delivers the high-velocity power necessary for efficient sanding and rapid surface preparation. Despite its high performance output, the unit remains compact and lightweight, making it an ideal choice for limited-space applications and overhead tasks where hand fatigue can quickly become a factor during prolonged work sessions.

Key Features That Stand Out

• High Speed and Power: Operates at a maximum rotational speed of 15,000 RPM for efficient sanding and quick surface preparation on small-area repairs or larger projects.
• Ergonomic Design: Features a compact, lightweight body equipped with a rubber molded palm grip to ensure added comfort during extended use.
• Adjustable Speed Regulator: Allows you to easily match the sanding speed to the specific task at hand for optimal control.
• Silenced Handle Exhaust: Directs exhaust air away from the work area to minimize dust and debris exposure while keeping the workspace cleaner.
• Two-Finger Throttle: Provides easier control over the tool and helps reduce operator fatigue during long operational periods.
• Dual-Pad Versatility: Comes complete with both 2-inch (50 mm) and 3-inch (75 mm) hook-and-loop backing pads for ultimate project flexibility.

Why We Recommend It

We recommend this pneumatic sander because it bridges the gap between industrial-grade power and everyday usability. The inclusion of both 2-inch and 3-inch hook-and-loop pads gives users incredible versatility right out of the box, letting them switch backing plates depending on the exact contours of the workpiece. Furthermore, the robust aluminum alloy construction guarantees a long service life, meaning you won’t have to worry about premature housing degradation or mechanical failures under heavy shop conditions.

Beyond its physical durability, the ergonomic considerations built into the CP7200S make it a standout choice. The rubber-molded palm grip combined with a progressive throttle and a two-finger design reduces strain on the user’s hand and wrist. safety and cleanliness are also properly addressed via the silenced handle exhaust, which routes air away from the immediate work zone, ensuring better visibility and a safer environment.

Performance Analysis

In terms of raw performance, the 15,000 RPM maximum speed allows the sander to chew through material quickly and cleanly, reducing the overall time spent on tedious prep work. The random orbital motion ensures that swirl marks are kept to an absolute minimum, leaving behind a smooth, ready-to-finish surface. Whether it is rust removal, automotive detailing, or intricate woodworking, the tool maintains steady torque and velocity under load.

The adjustable power regulator gives the operator fine-tuned control over the air delivery, making it easy to dial back the power for delicate finishing touches or crank it up to maximum for heavy stock removal. Because it relies on pneumatic power, it avoids the overheating issues common to electric sanders during marathon sessions, ensuring uninterrupted workflow.

Best For

This sander is best for automotive body shop technicians, professional woodworkers, and dedicated hobbyists who need a reliable, compact, and high-speed tool for detail work and tight areas. Its ability to maneuver in confined spaces makes it an essential asset for anyone regularly tackling localized surface repairs, rust remediation, or intricate furniture detailing.

Chicago Pneumatic Pros

• High maximum speed of 15,000 RPM for rapid material removal
• Includes both 2-inch and 3-inch hook-and-loop backing pads
• Durable and robust aluminum alloy body construction
• Comfortable rubber molded grip and fatigue-reducing two-finger throttle

Chicago Pneumatic Cons

• Requires a reliable air compressor setup to operate
• Higher initial price point compared to basic electric hobby sanders

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3. Lightweight 3-Inch Pneumatic Random Inch Random Orbital Sander Review

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The Lightweight 3-Inch Pneumatic Random Orbital Palm Sander reaching 12000 RPM with sandpaper and backing pad offers exceptional quality and performance for users looking for air-powered efficiency. Designed with a focus on user comfort, this sander features a lightweight build and low vibration architecture that significantly reduces hand fatigue during extended periods of sanding work. Whether you are tackling intricate automotive detailing or precision woodworking, its stable operation ensures you can consistently achieve a beautiful and smooth surface finish.

Operating at a remarkably low noise level of only 72 decibels, this pneumatic palm sander allows you to work in a much quieter environment compared to louder, traditional sanders. It is engineered for daily use, delivering outstanding durability and reliability over time. Additionally, the unit comes equipped out of the box with an extra 12 pieces of high-quality film sandpapers and a reliable backing pad, providing immediate value and utility for your upcoming projects.

Under the hood, this tool boasts a free speed of up to 12,000 RPM with adjustable speed control to suit your specific material removal needs. It requires a working pressure of 90 PSI and has an air consumption rate of 10.5 CFM, utilizing a precise 3/32-inch orbit diameter to prevent swirl marks and deliver a professional-grade finish. The inclusion of a 6-month warranty after receiving the product offers added peace of mind for buyers investing in this pneumatic setup.

Key Features That Stand Out

• Lightweight body with low vibration design to greatly reduce fatigue caused by long-time use
• Very stable operation capable of producing a beautiful, smooth surface finish
• Extremely quiet operation running at only 72 decibels for a more comfortable work environment
• High free speed of 12000 RPM featuring adjustable speed control and a 3/32-inch orbit diameter
• Air consumption rate of 10.5 CFM operating at a standard working pressure of 90 PSI
• Includes 12 pieces of high-quality film sandpapers, a backing pad, and a 6-month manufacturer warranty

Why We Recommend It

We recommend this pneumatic palm sander because it strikes an impressive balance between user comfort and high-speed performance. The reduced vibration and low 72-decibel noise output make it a standout choice for anyone who spends hours at the workbench and wants to minimize physical strain and hearing fatigue. Its ability to maintain a steady 12,000 RPM while producing a swirl-free finish translates to professional-looking results on detailed surfaces.

Furthermore, the inclusion of essential accessories right in the package—such as the backing pad and 12 pieces of high-quality film sandpapers—means you can get straight to work without hunting down extra supplies. Backed by a 6-month warranty and built with durability in mind for daily use, it represents a reliable and cost-effective pneumatic addition to any workshop or garage.

Performance Analysis

Performance-wise, this 3-inch pneumatic sander delivers consistent power through its 90 PSI working pressure requirement and 10.5 CFM air consumption. The 3/32-inch orbit diameter expertly blends aggressive material removal with fine-finishing capabilities, ensuring that workpieces are left smooth without deep gouges. Speed adjustments allow operators to dial in the exact revolutions needed for different substrates.

The operational stability is notable; even when pushing the motor toward its 12,000 RPM ceiling, the tool remains balanced in the hand. Coupled with the low vibration output, it enables precise control over curved edges, tight corners, and intricate woodworking or automotive panels where larger sanders simply cannot reach.

Best For

This pneumatic random orbital sander is best for woodworkers, automotive hobbyists, and DIY enthusiasts who already utilize an air compressor setup and need a compact, low-vibration tool for precision sanding, spot repairs, and achieving ultra-smooth surface finishes on smaller projects.

Pneumatic Sander Pros

• Lightweight and comfortable design minimizes user fatigue
• Remarkably quiet at only 72 decibels
• Reaches up to 12000 RPM with adjustable speed control
• Includes 12 high-quality film sandpapers and a backing pad

Pneumatic Sander Cons

• Requires an adequate air compressor setup (10.5 CFM at 90 PSI)
• Pneumatic hose can occasionally restrict movement compared to cordless models

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4. SI FANG Mini Air Sander Inch Random Orbital Sander Review

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When working on intricate details, tight spaces, or specialized small-scale projects, standard electric sanders can often feel far too bulky and cumbersome. The SI FANG Mini Air Sander offers a pneumatic alternative designed specifically for precision work. Featuring a versatile setup that accommodates multiple backing plate sizes, this compact dual-action palm sander brings professional-grade pneumatic performance directly to detailed tasks like automotive spot repairs, furniture deburring, and metal surface finishing. Because it relies on compressed air rather than an electric motor or battery pack, it delivers a lightweight handling experience that minimizes user fatigue over extended working sessions.

Out of the box, the tool provides exceptional value by coming thoroughly equipped with a comprehensive kit of accessories. Users receive three distinct backing plates measuring 1 inch, 2 inch, and 3 inch, alongside a generous assortment of matching sandpapers and polishing buffing pads. This modular versatility means you can easily transition from aggressive material removal to fine surface polishing simply by swapping out the pad and disc. Integrated knob speed adjustment further enhances control, allowing operators to fine-tune the pneumatic output to meet the exact demands of wood, metal, plastic, or stone projects.

Engineered for stability and efficiency, this dual-action air polisher utilizes an eccentric double-rotation polishing method to ensure a smooth, uniform finish free of harsh swirl marks. It achieves a free speed of up to 15000 RPM with a 4mm orbit diameter, operating efficiently at a working pressure of 6.3 BAR and an air consumption rate of 6CFM. Weighing a mere 0.68 kg, the low-vibration architecture ensures that operators can maintain a steady, comfortable grip without experiencing excessive hand strain, making it an indispensable addition to any pneumatic tool collection.

Key Features That Stand Out

• Complete kit includes 1 mini pneumatic air orbital sander, 3 backing plates (1-inch, 2-inch, and 3-inch), and a large selection of sanding and buffing discs.
• Eccentric double-rotation polishing method delivers a highly uniform and smooth surface finish.
• Lightweight design at 0.68 kg with low vibration rates for reduced hand fatigue during long operations.
• Adjustable knob speed control allows easy adaptation to different material requirements and project types.
• Compatible with a wide array of sanding discs, sponge pads, and wool pads for dual-purpose sanding and automotive waxing.
• Reaches up to 15000 RPM with a 4mm orbit diameter, powered via a standard air compressor setup.

Why We Recommend It

We recommend the SI FANG Mini Air Sander because it punches well above its weight class in terms of accessory inclusion and application versatility. Having the ability to switch seamlessly between 1-inch, 2-inch, and 3-inch backing plates transforms a single tool into a multi-functional system capable of handling everything from microscopic spot repairs on car bodies to edge smoothing on delicate wooden crafts. Its pneumatic nature also means you never have to worry about burning out an electric motor during heavy continuous use, provided your air compressor meets the 6CFM requirement.

Furthermore, the ergonomic focus of this sander makes it a joy to use on detailed projects where precision is paramount. The low vibration output prevents the numbness and fatigue commonly associated with cheaper, poorly balanced palm sanders. Combined with a competitive price point of $35.99, it delivers accessible professional results for hobbyists, automotive detailers, and woodworkers looking to upgrade their arsenal of detail-finishing tools.

Performance Analysis

Operating at 15000 RPM with a 4mm orbit diameter, this pneumatic sander provides plenty of cutting power for clearing rust spots, removing solder joints, and deburring edges. The dual-action random orbital motion successfully mitigates the risk of swirl marks, yielding a clean, paint-ready surface. Air consumption sits at 6CFM, which runs smoothly on most standard workshop compressors. The inclusion of an easy-access speed adjustment knob gives operators precise command over the tool’s aggressiveness.

While the machine requires an external compressed air source and is strictly a pneumatic tool rather than a cordless electric unit, its performance stability is consistently reliable. The low-profile build allows it to navigate tight corners and recessed areas that larger 5-inch or 6-inch sanders simply cannot reach, making it an essential specialist tool for fine fabrication work.

Best For

This mini air sander is best for automotive detailers, metalworkers, and woodworking hobbyists who frequently tackle small-scale projects, spot repairs, rust removal, and intricate polishing tasks where standard-sized sanders are too unwieldy to provide proper control.

SI FANG Pros

• Extensive accessory package featuring multiple backing plate sizes and numerous sanding/buffing pads.
• Lightweight 0.68 kg body significantly reduces hand fatigue over long usage periods.
• Dual-action eccentric rotation produces smooth, uniform, swirl-free finishes.
• Convenient knob speed adjustment for precise control across various materials.

SI FANG Cons

• Requires an external air compressor and adequate airflow (6CFM) to operate.
• Not suitable for large surface area sanding due to the small 1-inch, 2-inch, and 3-inch pad capacities.
• Included sanding disc grits are distributed randomly.

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5. Heavy-Duty Chicago Pneumatic 3-Inch Inch Random Orbital Sander Review

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When professional automotive technicians, woodworkers, and metal fabricators need a dependable pneumatic solution for detailed surface preparation, the Heavy-Duty Chicago Pneumatic 3-Inch Air Random Rotary Sander Tool with a comfortable pistol handle stands out as a formidable contender. Priced at $115.65 and boasting an impressive 4.5-star user rating, this compact sanding powerhouse is engineered specifically for daily use in demanding workshop environments. Unlike bulky electric sanders that can cause hand fatigue and restrict movement in confined spaces, this air-powered model relies on an ergonomic pistol grip configuration to give operators precise command over intricate detailing tasks.

Designed to navigate tight areas effortlessly, the tool combines a lightweight footprint with robust pneumatic mechanics. Its architecture is tailored for professionals who require consistent rotational speed and exceptional durability over long shifts. The inclusion of a rubber molded palm grip further enhances the user experience by dampening vibrations and ensuring a secure, non-slip hold even during extended sanding sessions. Whether you are feathering edges, removing spot welds, or smoothing out blemishes in cramped corners, this Chicago Pneumatic sander delivers the reliability expected from a heavy-duty industrial brand.

Operational control is a defining characteristic of this tool, highlighted by an adjustable speed regulator that lets users precisely match the sanding velocity to the specific application at hand. A two-finger throttle mechanism reduces finger strain and makes continuous speed modulation intuitive. Furthermore, the integrated silenced handle exhaust system cleverly routes exhaust air away from the immediate work area, keeping debris from scattering across your freshly prepped surfaces while maintaining a quieter working environment.

Key Features That Stand Out

• Compact and lightweight design for easy access in tight, hard-to-reach areas
• Rubber molded palm grip engineered for added comfort and reduced vibration
• Adjustable speed regulator allowing you to match the speed precisely to the job
• Two-finger throttle designed for easier control and less operator fatigue
• Silenced handle exhaust that directs air away from the work area
• Built for daily use, offering outstanding durability and long-term reliability

Why We Recommend It

We recommend the Chicago Pneumatic 3-Inch Sander because it bridges the gap between raw industrial power and fine ergonomic control. Pneumatic tools are frequently favored in professional settings for their sustained power output, and this model exemplifies that advantage by delivering high-RPM performance without overheating. The pistol grip layout provides a natural wrist angle that significantly minimizes the physical strain typically associated with traditional palm-style sanders, making it an excellent investment for anyone who spends hours on detailed finishing work.

Beyond its physical comfort, the overall value proposition at $115.65 is hard to ignore for commercial shops and serious hobbyists alike. Its construction quality speaks to heavy-duty applications where tools face daily abuse. The thoughtful inclusion of a silenced exhaust and a responsive two-finger throttle demonstrates that Chicago Pneumatic prioritized user experience alongside raw capability, resulting in a well-rounded pneumatic sander that performs reliably under pressure.

Performance Analysis

Operating on compressed air, this random orbital sander delivers smooth, swirl-free finishes on a variety of materials. The random orbital action prevents the formation of deep circular scratches, ensuring a pristine surface ready for painting or clear coat application. The adjustable speed regulator functions smoothly, allowing for instant transitions between aggressive material removal and delicate surface smoothing. Air delivery is efficiently managed, and the tool maintains consistent torque under load, ensuring that stalling is kept to an absolute minimum during rigorous sanding tasks.

In terms of workplace cleanliness and usability, the directional silenced exhaust performs exceptionally well. By pushing exhaust air backward and away from the sanding pad, it prevents loose dust and debris from being blown across the workpiece. Combined with the secure grip offered by the rubber molding and the smooth actuation of the two-finger throttle, the machine operates with a high degree of predictability and control.

Best For

This air sander is best for professional automotive technicians, body shop specialists, and dedicated woodworkers who routinely require a reliable 3-inch tool for tight spaces, spot repairs, and intricate detail sanding. It is ideal for users who already have an adequate compressed air setup in their shop and demand a durable, ergonomically friendly tool capable of withstanding heavy daily use.

Chicago Pneumatic Sander Pros

• Ergonomic pistol handle with a comfortable rubber molded palm grip
• Compact and lightweight build for maneuvering in tight areas
• Adjustable speed regulator for versatile application control
• Silenced handle exhaust keeps air and debris away from the work area

Chicago Pneumatic Sander Cons

• Requires an external compressed air source and compatible airline setup
• Pistol grip design may take some adjustment for users accustomed exclusively to palm sanders

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Complete Buying Guide for Best 3 Inch Random Orbital Sander

Choosing the right 3-inch random orbital sander can significantly impact the quality of your finish, whether you are working on automotive detailing, tight woodworking joints, or intricate furniture restoration. Because a 3-inch sander is specifically designed for precision and hard-to-reach areas, understanding the core mechanical and ergonomic differences between models is essential for making an informed investment.

Essential Factors

When evaluating compact sanders, pay close attention to the orbit stroke diameter. A 3mm orbit provides an exceptionally fine finish, making it ideal for paint correction and final surface prep, while a 5mm orbit offers a more aggressive stock removal rate, perfect for shaping and leveling. Power source is another critical consideration; pneumatic sanders require a reliable air compressor and offer lightweight handling, whereas electric and cordless models provide ultimate portability and consistent speed control. Additionally, look for robust dust extraction capabilities. A clean workspace not only extends abrasive lifespan but also improves visibility and protects your respiratory health.

Budget Planning

Pricing for 3-inch random orbital sanders varies widely based on whether you choose a hobbyist tool or a professional-grade machine. Entry-level pneumatic or corded hobby models typically range from $50 to $150, which is suitable for occasional DIY tasks and minor household repairs. However, professional brushless electric systems—such as advanced brushless units—can range from $400 to over $600. While the upfront cost is higher, professional tools offer constant speed under load, superior ergonomics, brushless longevity, and vibration-reduction technology that justifies the investment for daily workshop use or specialized automotive detailing.

Final Thoughts

Ultimately, the best 3-inch random orbital sander is one that matches your specific workflow intensity and precision requirements. Assess your project scope, prioritize ergonomics to prevent fatigue during extended polishing or sanding sessions, and choose a model with dependable dust collection to keep your work surface pristine. Taking the time to select a high-performance tool will pay off with flawless, scratch-free results on every detailed project.

Best 3 Inch Random Orbital Sander: Frequently Asked Questions

Final Thoughts on Best 3 Inch Random Orbital Sander

For unmatched performance, precision engineering, and professional-grade durability in a compact footprint, we strongly recommend the Mirka DEROS 350X Electric Random Orbital Sander with a 3-inch pad and 5mm orbit as the ultimate choice for your detailed sanding and finishing needs.