These top plates are for use with the InLine Fabrication Quick change top plate system (mount sold separately).
If you have limited or multi use bench space, the quick change system is what you need. Remove 2 thumbnuts and swap presses in 30 seconds. These plates secure into the InLine Fab quick change base plate for quick swapping of your reloading gear. Plates are available for most presses from Hornady, RCBS, Dillon, Redding, Lyman & LEE.
The top plates come with the appropriate hardware to attach your press to the plate.
Besides one quick change top plate per press/accessory you have, you need one of the receiver bases below to complete the quick change system: