SpecificationsSquare Drive: 1/2"Free Speed: 150 rpmOverall Length: 10" (254mm)Net Weight: 2-3/4 lbs (1.24 kg)Max. Torque: 50 ft./lbs.Bolt Capacity: 1/2" (6mm)Air Inlet Thread NPT: 1/4"Air Hose I.D. Size: 3/8" (10mm)Average Air Consumption: 6 cfmAir Pressure: 90-120 psi SKU: AST.131 Brand: ASTRO Country of Manufacture: Taiwan Supplier Part Number: ASTRO131 Unit of Measure: PCS