This Dillon Precision Case Locator Rod for 6mm and 6.8mm is to be used with the Super Swage 600. Until now, reusing military brass, with its crimped primer pockets, has been a tedious task. The Dillon solution is a remarkably simple device that bolts to your bench and allows you to swage the primer pockets with speed and ease. The case is supported from the inside, so you won't be tearing the rims off the brass. A tool steel, hardened swage rod (easy to change from large to small primers) simply rolls the crimp away. No reaming is necessary. Their unique compound cam leverage system assures not only ease of operation, but perfect alignment with each and every round.