Astro 1/4' Mini Air Ratchet Model AO1111 1/4' Palm Ratchet Wrench --Compact and lightweight --Ideal tool for confined working areas such as under dashboard work –Ergonomically designed blue composite body --Overall length 5 1/2' (140mm) Specifications: Square Drive 1/4' (6mm) Free Speed 240rpm Overall Length 5-1/2' (140mm) Net Weight 0.94lbs. (0.43kg) Max. Torque 16ft./lbs. Bolt Capacity 1/4' (6mm) Air Inlet Thread 1/4' NPT Air Hose I.D. Size 3/8' (10mm) Avg. Air Consumption: 4cfm Air Pressure 90psi