From the Manufacturer
The CP7150 Heavy Duty Air Hammer has a longer piston strokes for more force per blow. Integral muffler minimizes exhaust sound. All Impact parts are heat-treated for durability and an ergonomic handle for added operator comfort. Ideal for muffler and pipe removal, body shop work, shock work, scraping rust, and light front-end work. 2100 blows per minute. Spring retainer for simple accessory changes. 0.401-Inch chisel shank opening. Specifications: chisel shank opening - 0.401-Inch, bore diameter - 3/4-Inch, cfm - 4.5, piston stroke length - 3 1/2-Inch, hose size - 3/8-Inch, blows per minute: 2100. (replaces the CP715).