The Hornady Primer Pocket Cutting Heads fit our popular case preparation tools like the Hornady Quick Change hand Tool, Case Prep Trio, Case Prep Duo, Universal Handle or other tools with 8-32 threads. Hornady case care and prep tools make cleaning, trimming, deburring, or chamfering cartridge cases easier. Each product is designed to boost the accuracy of your handloads and increase the efficiency of your efforts, saving you valuable time on the bench so you can get out in the field!