0.33 HP Straight Die Grinder Lightweight, durable, and maneuverable, the 308B straight die grinder offers powerful performance. With a comfortable composite grip, this air grinder is ideal for a variety of applications, including porting, weld breaking, de-burring, polishing, and grinding. Powerful motor delivers 0.33 HP (0.25 kW) and 25,000 rpm free speed. Lightweight, durable, ergonomic composite housing protects tool from cold air and offers greater operator comfort. Integral safety-lock throttle lever prevent accidental start up. Rear exhaust directs air away from the operator. Piped-away exhaust kit optional. Tool comes with 1/4 and 6 mm collets and two wrenches 308B Yes - SILICA, CRYSTALLINE (AIRBORNE PARTICLES OF RESPIRABLE SIZE)