The general duty Zip Gun® Hammer from Chicago Pneumatic is perfect for applications such as muffler and pipe removal, body shop work, bolt cutting, bushing driving, and overall front end work. Gives 3500 blows per minute at 90 psi. A "Quick-Change" retainer makes accessory changes simple. It features an integral muffler that minimizes exhaust sound. Impact parts are heat-treated for durability, and it has an ergonomic handle for added operator comfort.