This straight shaft, tool has been extended 3 inches allow operator to get into hard to reach areas. Lightweight .3 HP pneumatic die grinder is designed to efficiently perform a variety of polishing, buffing, shaping, and deburring functions. This .3 HP, 18000 RPM die grinder has rear exhaust, comes standard with 1/4" collet, as well as a 1/8" collet insert, a 1/4 " to 1/8" reduction bushing, and 2 wrenches.