SHELLHOLDERS SET - Now you can control headspace; You can easily adjust the shoulder bump to customize cases to your specific chamber thanks to the Competition Shellholders Set; It makes every die a custom die HIGH PERFORMANCE - The easy to use Competition Shellholders enable you to perfectly match the headspace of your reloaded ammo to any gun; Once the proper shellholder is determined your results are repeatable and no die adjustment is necessary EASY TO USE - Each shellholder has a distinct black oxide finish and is clearly marked to indicate the amount it will decrease case-to-chamber headspace - no special tools or gages are needed DELIVERY SCOPE - The Competition Shellholders are packaged in five piece sets in .002" increments (+.002", +.004", +.006", +.008" and +.010"); These shellholders sets are available in the following sizes: #1, #2, #4, #6, #7, #10, #12, #18 & #35 RELOADING - For nearly 80 years has been at the forefront of the Reloading Equipment marketplace; provides gun owners with the utmost in dies, the perfect presses and accessories for your particular gun make, model, and design