MTS538 Features: -Composite lightweight housing.-Energy efficient motor for long lasting life.-Ergonomic and evenly balanced.-Twin Hammer.-3/8"" Drive Composite Impact Wrench. Warranty: -One year replacement warranty Max. Torque: 250 ft./lbs.Free Speed (RPM) 11,000Min. Housing Size: 3/8" (10mm)Length: 6.56"Average Air Consumption (CFM): 4.0Weight: 2.38 lbs..-1 yr warranty on material and workmanship.