The STEELMAN 1/4 inch Positive Clutch Air Screwdriver has a built-in quick change chuck in addition to a positive clutch for full power through the drive cycle. This tool has a super accurate torque leaving less room for errors. The convenient forward/reverse switch lets you maneuver easily between the two. It also has a rear exhaust which helps keep your work just the way you want it. The Specs are as follows: The Specs are as follows: 1,800 RPM, chuck size 1/4 inch, torque 115lbs; 1/4 inch NPT air inlet thread, 3/8 inch air hose ID, PSI 90 air pressure, 4 CFM, overall length is 7 inch and it weighs 2.95 lbs.