The Lee Breech Lock Update Kit will convert your green or red press to allow use of Lee's Breech Lock quick-change bushing feature. Kit includes:Breech lock adapter Spline drive lock-ring eliminator Lock-ring wrench 1-1/4"-12 Compatible with the following presses:Lee Precision Classic CastHornady Iron Hornady Classic / Lock-N-LoadRCBS Rock Chucker SupremeRedding Big BossRedding 700 Ultramag 1-1/2"-12 Compatible with the following presses:Hornady 50 BMG Dillon BFR 50BMGRCBS AmmoMaster 2