Our team of engineers designed in both performance and ergonomics to the 3M Elite Non-Vacuum Random Orbital Sanders, which are loaded with features to reduce vibration and noise and provide greater wrist support and operator comfort. The comfortable rubber grip featuring 3M Gripping Material, curved-throttle alloy steel lever, and built-in wrist support provide comfortable control, while the recessed lever platform eliminates pinch and pressure points on the operator s palm. The speed control dial is conveniently located on the side and thumb-controlled. The lighter-weight tool has a composite cover that extends to the base to absorb and reduce vibration and keeps tools in service by preventing cracked housings, while the internal muffler helps reduce noise and won t break off. 3M Elite Non-Vacuum Random Orbital Sanders optimize sanding and surface preparation on many surfaces, including wood, metal prep for paint, fiberglass and composite materials, and many other substrates. Also known as dual action (D/A) sanders, these industrial-grade tools rotate the abrasive disc and disc pad in two simultaneous overlapping oval patterns so no single abrasive particle follows the same path twice, resulting in a swirl-free finish, even when sanding against the grain.v Pneumatic sanders are also called air sanders and run on power generated by an air compressor. Non-vacuum models such as these are not connected to a vacuum system and are used in applications where dust extraction is not a concern.