1 1/2"-12 Breech Lock Update Kit. Convert your green, red or blue press to allow use Lee's Breech Lock quick-change bushing feature. Kit includes: 1 1/2"-12 breech lock adapter Spline drive lock-ring eliminator Lock-ring wrench Compatible with the following presses: Hornady 50 BMG Dillon BFR 50BMG RCBS AmmoMaster 2 ..and more (verify your removable press bushing/adapter size is 1 1/2"-12) 1 1/4"-12 Breech Lock Update Kit. Convert your green or red press to allow use of Lee's Breech Lock quick-change bushing feature. Kit includes: 1 1/4"-12 breech lock adapter Spline drive lock-ring eliminator Lock-ring wrench Compatible with the following presses: Lee Precision Classic Cast Hornady Iron Hornady Classic / Lock-N-Load RCBS Rock Chucker Supreme Redding Big Boss Redding 700 Ultramag ..and more (verify your removable press bushing/adapter size is 1 1/4"-12)