This Air Angle Die Grinder with 1/8" and 1/4" collet size is great for Grinding, Cutting, FABRICATION WORK, and MORE!!! Free speed:20,000RPMAverage air consumption: 4CFMCollet size: 1/8", 1/4", 3mm, 6mmAngle: 90oExhaust: RearLength:157mmWeight: 0.50Kg, 1.10LbsWorking pressure:90psi, 6.3kg/cm2Hose size: 3/8"Air inlet:1/4"