For use in conjunction with the Hornady Case Activated Powder Drop (product # 591-344), the Quick Change Powder Die and Powder Through Expanders make reloading on your Lock-N-Load faster and easier. The Quick Change die comes with a lower bracket with guide bushing and lock ring. Expanders are available (sold separately) in .355, .357, .400, .430, .451/.452, .475 and .500 diameter. The Expanders allow you to charge the case while expanding the case mouth (Hornady suggest you fill that station with the powder cop die so you can ensure that each case is properly charged with powder. The Powder Cop die is sold separately).