Achieve precise headspace control with the new Redding Competition Shellholders. These shellholders come in five-piece sets, each offering .002 inches increments (+.002 inches, +.004 inches, +.006 inches, +.008 inches and +.010 inches) for fine-tuned adjustments. With a distinct black oxide finish, each shellholder is clearly marked to show how much it will reduce case-to-chamber headspace. This allows you to easily adjust the shoulder bump, ensuring that you can customize cases to perfectly match your specific chamber for superior accuracy and performance.