Hornady PROGRESSIVE LNL DIE BUSHING 10 PKMaximize your reloading time with the Lock-N-Load quick change bushing system. The Lock-N-Load reloading system is a patented quick change bushing system that lets you change dies with a simple flick of the wrist. With Lock-N-Load technology in your reloading press, you can stop loading, change dies and start loading another caliber in SECONDS.