Your cartridge specific shell holder is used to insert the cartridges into the machine. A custom brass grip for standard shell holders is provided with each annealer. This attaches to the shell holder to make it more comfortable to use. Insert the shell holder lug end into the grip and tighten the collet. The 50 BMG pilot grip is threaded and insulated to prevent heating. It is sold separately.
Shell holders not supplied. All common brands of standard shell holders as used in reloading presses will fit into the brass grip. We get the best results with Redding EZ feed Shell Holders, in particular if using the AMP MATE auto feeder. 50 Cal shell holder brass grip sold separately.