The CP7110K kit includes (1) posi-lock quick change retainer, (1) spring retainer, (4) chisels, and heavy duty carrying case. Ideal for exhaust system work, bolt cutting, bushing driving, shearing and front end work. Shank: .401. Average air consumption: 3.65 cfm. The CP7110 is a powerful, yet economical low vibration air hammer.Vibration isolation system for smoother operation and greater comfort. It also features an ergonomic handle for added operator comfort. Touch trigger for precision start ups and total control. Shank size: .401; bore: 3/4", average air consumption: 3.38 cfm; air inlet thread: 1/4" NPTF; minimum hose size: 3/8"; sound level:105 dBA. 3,200 blow per minute.