The Hornady Lock-N-Load Press Conversion Bushing are designed to work with the Lock-N-Load Conversion Insert. Simply insert the Lock-N-Load conversion bushing into a standard press with a 1-1/4" -12 thread and you are ready to use the Lock-N-Load System. Allows for the use of the Lock-N-Load technology on most brands of reloading presses. Fits: Conversion Bushing Fits any press with 1-1/4"-12 threads Function: Allows use of Hornady Lock-N-Load die bushings with other manufacturers' presses