Chicago Pneumatic Size "000" Simplate Valve Utility/Rivet Hammer sold with steel air inlet bushing, and spring retainer. This hammer has extremely fast bpm due to its valve type, and can be used for many operations including riveting. It is one of CP'S smallest and lightest guns at 2 lbs, and 6" length. It uses .401 size sets has a 1/8" rivet capacity.