Hear and feel the power of the Thunder Gun. Looks and sounds just like the original tool used by 80% of NASCAR pit crews! Features a black powder-coated handle and housing. Put this tool to work at the track or in your garage, and at a much more affordable cost than the original. U.S.A. Drive (in.): 1/2, Average Air Consumption (CFM): 5.4, CFM at Load: 21, Speed - No Load (RPM): 10,000, Blows Per Minute (BPM): 1,200, Max. Torque (ft.-lbs.): 625, Working Torque (ft.-lb.): 40 - 400, Inlet Size (in.): 1/4, Min. Hose Size (in.): 3/8, Standard Bolt Capacity (in.): 5/8, Variable Speed: Yes