The CP 4608 and 4611 rivet busters offer one of the best power-to-weight ratios on the market.
They also have a teasing throttle for precise control. The teasing throttle is part of the Controlled Power System (CPS). Other features of the system are control of blank firing and control over excessive wear. There are also features for control over premature structural breakage. An indicator groove on the lower sleeve shows when it is time to replace the bumper.