The Forster Center for Pocket Cleaner/Chamfering Tool is a case prep tool used for Forster Original and Classic case trimmers. This tool gets the job done quickly and with outstanding results far better than prepping by hand. For reloading each case must be in excellent condition and this tool ensures that. This tool is designed to mount in the collet side of the trimmer which provides support to the case mouth. To use the tool hold the case mouth over the center tool with one hand and operate the cleaner or chamfer with the other by turning the crank.