Features:This air die grinder is used for polishing and grinding various metal moulds.Lightweight aluminum alloy housing, high quality and durable, long service life.Quality bearings for smooth and powerful operation, high accuracy.Integral baffle with rear exhaust gives quite operation.Safety trigger to prevent inadvertent operation, safe to use.Supplied with spanner and adapter for easily operate.Suitable for professional users.Specifications:Item Name: Air Die GrinderMaterial: Aluminum AlloyColor: Silver + BlackFree Speed: 20000-23000RPMCollet Size: 1/4inch(6mm)Air Inlet(N.P.T): 1/4inchWorking Air Pressure: 90PSIAir Consumption: 4CFMExhaust: RearOverall Length: 156mm/6.1inchPackage Weight: approx.448gPackage List:1 * Air Die Grinder2 * Spanner1 * AdapterNote:Installation instruction is not included, professional operation is highly recommended.