CPT721 Features: -Rocking dog clutch with oil lubrication for long life and durability.-Energy efficient motor for maximum performance.-Great tool for small engine repair, bench work and transmission.-Pistol-type grip with ergonomically designed handle for less fatigue. Dimensions: -Free speed: 11,000 RPMBuilt-in power regulator. Working torque: 5-50 ft./lbs.; maximum torque: 75 ft.-lbs.; blows per minute: 1620; average air consumption: 2.5 cfm; air inlet thread: 1/4" NPTF; minimum hose size: 3/8"; sound dBA: 84.1; Weight: 2.63 lbs..-3/8" Drive Heavy Duty Air Impact Wrench. Warranty: -1 yr warranty on material and workmanship.