TEKIRO Air Die Grinder / Gerinda Tangan Angin 1/4 #34; 1/4 inch AT-AG1629 SPECIFICATION Collet Size : 1/4” Length : 6” Free Speed : 25,000rpm Weight : 3/4 lbs Overall Length : 5-1/4” Average Air Consumption : 4CFM Recommended Hose Size : 3/8”I.D. Air Inlet : 1/4” NPT Maximum Air Pressure : 90psi • Aluminum body design • Rear exhaust air flow system • High speed RPM