The heavy duty Pneumatic 1/4" 90° Angle Die Grinder has a blue composite body that is compact and lightweight. The composite handle reduces vibration and the rib texture on the handle  provides a firm grip. It features a lever throttle for feathering control with a free speed of 20,000 rpm, a front exhaust, and a built-in regulator. The Pneumatic 1/4" Medium Die Grinder's composite body is compact and lightweight. Features a rear exhaust air flow system directs air away from work surface, a built-in regulator, and a safety lever.