1 1/4"-12 Breech Lock Update Kit by Lee carries the 1 1/4"-12 Breech Lock Update Kit from Lee. 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)