The Wheeler Engineering Delta Series Pivot Pin Detent and Roll Pin Installation Tool ends the aggravation of launching a pivot pin detent across the room. Designed specifically for the task of installing these pins on the AR-15 style rifles, this tool makes the job fast and effortless. A roll pin starter and punch is also included for all lower receiver roll pins. The black zinc plated tool comes with a handy key ring so it can be stored close at hand.