The Astro Pneumatic Tool 1128 3/8" Mini Impact Ratchet Wrench is the latest in impact ratchet technology. This tool will not stop, or rip from the user's hand like traditional ratchet wrenches. Its 700rpm is 2-3 times faster than other ratchets on the market, and the sealed head design increased the tool life. This impact has 50ft/lbs. of working torque and is only 6.45" long. Specifications: Square Drive: 3/8" Free Speed: 700rpm Overall Length: 6.45" (164mm) Net Weight: 1.32lbs. (.6kg) Working Torque: 50ft/lbs. Noise Level: 89.6bB Air Inlet Thread NPT: 1/4" Avg. Air Consumpt.: 3.1cfm Air Pressure: 90psi.