Hornady Shell Holders #1 390541 are precision machined from solid steel then heat treated to perform flawlessly for the life of the press. The Shell Holder #1 by Hornady fits most of the other Hornady Gunsmith and Reloading Equipment available. Hornady Steel Shell Holders fit most other brands of reloading presses, making it one of the most versatile Shell Holders on the market. This piece of Hornady Gunsmith and Reloading Equipment is made to be used with 5.6 x 57, 240 Weatherby Mag, 6MM/284, 25/06 Remington, 6.5/284, 7MM/08, 7 x 64, 284 Win, 300 Savage., 308 Win, 7.7 Jap., 8MM Mau.,8 x 60 S, 9.3 x 57, and 5 WM 260 Remingtons. Gunsmith and Reloading Equipment will have you reloading your brass more quickly and will fewer problems!