These pistol-grip air-powered impact wrenches have a square drive and a standard anvil length. - They are full-size impact wrenches with high torque output. - The pistol grip has a trigger that is pressed to activate the wrench. - Pistol grips provide ergonomic handling when working on vertical surfaces from the user's waist to chest, horizontal surfaces at mid-thigh or lower, and horizontal surfaces directly overhead. Power Source / Air Powered Air Consumption / 17 cfm Air Inlet / 1/4 in NPT Female Air Pressure / 90 psi Max. Air Pressure / 90 psi Min. Air Pressure / 50 psi Min. Hose Size / 3/8 in Exhaust Location / Bottom Duty Rating / General Duty Breakaway Torque / 600 ft-lb Fastening Torque / 600 ft-lb Free Speed / 9, 000 RPM Impact Rated / Yes Impact Sound Level / 96 dB Impacts per Minute / 1, 200 Number of Speed Settings / 5 Max. Bolt Capacity / 5/8 in Drive Size / 1/2 in Square Drive Type / Standard Retainer Type / Friction Ring Clutch Style / Twin Hammer Tool Style / Full-Size Vibration Level / 7.6 m/sq sec Overall Length / 7 1/4 in Handle Material / Aluminum Housing Material / Aluminum Handle Type / Pistol Grip Tool Brand / Speedaire Built-In Light / No Features / Twin Hammer Mechanism Light Weight Aluminum Housing Contoured Comfort Pistol Grip Adjustable Power Regulator with 5 Settings High Torque and Low Air Consumption Quiet Operation Pressure Feed Lubrication System Weight / 5.8 lb