A reloader never knows when a part might break. Be prepared for anything with high quality factory replacement parts that will have your RCBS Reloading Dies sizing and depriming like the day they were first taken out of their green box. RCBS offers a variety of decapping pins for all reloading needs. Headed pins are for most current production expander-decapping and decapping rods. - X-small pins: Designed to use with undersized flash holes and have a diameter of .057 inch