Check the listing for details. CHIEF Pneumatic 1/4 in. Professional Mini Die Grinder 64371. Condition: New. Listed at 59.99 USD. Professional Air Mini Die Grinder is compact and easy to maneuver in tight areas. The adjustable speed regulator makes it easy to work with a wide variety of materials. The paddle-style trigger is designed for easy, precise control.Compact and durable design ideal for maneuverability and hard to reach areasLightweight aluminum body for less fatigue and effortless handlingPaddle-style trigger for smooth operation and controlFront exhaust directs debris away from work areaAdjustable speed regulator for a variety of job applicationsCollet size (in.)1/4 in.Exhaust locationFrontRecommended hose size (in.)3/8 in.Air inlet size1/4 in. - 18 NPTAir Consumption2.9 CFM @ 90 PSISpeed (max)25,000 RPMProduct Length4-7/8 in.Product Weight0.6 lb.Product Width2-1/4 in.Shipping Weight1.15 lb.Working pressure (psi)90 PSI