Take control of headspace like never before with the new Redding Competition Shellholders. Packaged in five-piece sets, these shellholders are available in precise .002 inches increments (+.002 inches, +.004 inches, +.006 inches, +.008 inches and +.010 inches), allowing for fine adjustments to case-to-chamber fit. Each shellholder features a durable black oxide finish and is clearly marked to show exactly how much it will decrease headspace. This design makes it easy-to adjust the shoulder bump and customize your cases to perfectly match your specific chamber, ensuring optimal performance and consistency in your reloads.