Air Sander, 3" & 5" Fiber Pad, 18,000 RPM, 0.45 HP, Front Exhaust. This economical high-speed sander is ideal for light sanding, feather edging, and rust removal. With a 0.45 HP, 18,000 RPM motor and built-in power regulator, you can bet this small tool works as well as its bigger counterparts. Performance: With a built-in power regulator and variable speed, you can exercise full control over your tool and choose exactly how to use it. 0.45 Horsepower and 18000 RPM. Comfort: Compact, lightweight, and easy to handle for your prolonged comfort. Access: With a 3" (75mm) and 5" (125mm) pad, this sander is great for small jobs and hard-to-reach places.