The Lee Breech Lock system allows reloaders to quickly change between dies. These quick change bushings with lock ring eliminator collar help to provide unmatched precision and convenience when adjusting dies. The split clamp positively locks reloading dies into position. These extra bushing allow the reloader to quickly and easily change dies in a matter of seconds. Just give the bushing a small twist and website remove from the press. Dies fit inside the bushing and stay more info intact with the setting here for the next reloading session saving valuable setup time.