Taylor Pneumatic T-7788HR 1/2" Reversible Drill with hi-torque double reduction gears, all ball bearing construction, and aluminum housing. Rated to 500 RPM with 1/2" chuck size. This drill weighs 3.5 lbs and is 8-3/4" in length. 90 PSI max air pressure required with a 1/4" NPT air inlet.