The factory primer catch tray for the Rock Chucker Supreme can be hit and miss with catching the decapped primers with them ending up on the floor or scattered around on the bench. This lil guy takes care of that, rides against the ram, catches the primer and routes them down a hose into a wastebasket or bottle. Comes with 3D printed catch and 2' of discharge hose. Easy install, simply snap the catch to the press and install the hose to route primer out of the way and into a receptacle for disposal. Also designed to work with the Inline Case Ejector System.