FEATURES Air Die Grinder is suitable for many automotive and industrial high-speed grinding  This Grinder can be used to clean dies, rotors, backing plates, and brake pad mounts. Used to grind salve seats, dress welds, and enlarge holes. Can use with 1/4"(6mm) or 1/8"(3mm) grinding accessories. SPECIFICATIONS Brand Name Zipp Air Tool USA Item model number ZP313 Collet Size 1/4" (6 mm) Net Weight 1.3 lbs (0.6 kgs) Length 7" (178 mm) RPM 22,000 Air Inlet Size 1/4" NPT/PT Min. Hose Size 3/8" (10mm) Avg. Air Consumption 3.7 cfm