Air Die Grinder, 25,000 RPM, 0.33 HP, 1/4" Collet, Rear Exhaust. Lightweight and durable for ultimate performance, the 308B die grinder is the perfect choice.  These powerful grinders feature a composite grip for superior ergonomics and comfort,  and can be used in various applications including porting, weld breaking, de-burring, polishing and grinding. Also available in the 308BK kit which includes 4 burrs. Performance: Powerful vane motor delivers 0.33 HP and 25,000 RPM free speed. Durable: Ball-bearing construction improves balance, reduces vibration, and ensures a longer life. Built-in lubricating wick increases gear life. Lightweight: At only 1lb., the ergonomic composite housing protects this tool from cold air and offers greater operator comfort. Safety: Integral safety-lock throttle lever prevents accidental start up. Piped Away Exhaust Ready: These die grinders are compatible with “piped away” exhaust kits, so you can transfer exhaust away from you and your workspace. Rear exhaust directs air away from the operator. Also available in the 308BK kit which includes 4 burrs and a blow-moulded carrying case.