The Chicago Pneumatic CP0012 2R is the new addition to the CP range of pneumatic hammers for light chipping and scaling duties. Since the CP0012 is light and has medium hitting power, it is very easy to handle and control for more precise jobs. Commonly known as the gun or pneumatic chipper, they have typical applications that include alteration work, hole making, and trimming. 0.680” round shank / oval collar bit size.