This case prep tool is deigned to work in both of Forster "Original" and "Classic" case trimmers for faster, more accurate results than prepping by hand to ensure that each case is in the best condition for reloading. Pocket Chamfer tool removes the military primer pocket crimp so you can reload military brass. Use the case trimmer stop collar to control uniformity and depth of the cut. Staggered-tooth cutter will chamfer thousands of spent military rounds. Mfg: Forster Products, Inc.