Steelman Medium Air Hammer with a 3/4" bore and 3-1/2" stroke operates at 2,100 blows per minute. This heavy-duty, air-powered tool features longer piston strokes for more force per blow, and a convenient, quick-change chisel retainer is included to accept standard .401" shank chisels. This product also features a 1/4" air inlet (for 3/8" hose) and runs on 90 PSI of air pressure, with an air consumption of 4 CFM, measuring 4-1/2" in overall length.