Yankee Hill Machine .308 .625X24 Rifle Thread Protector .920 Outer Diameter Matte. Most of the thread protectors on the market today have a tapered end nearly eliminating the possibility of damage to the very tip of your barrel. This offers two advantages: it protects the very tip of your barrel and in most cases it eliminates damage to the very tip of your barrel. First they eliminate damage to the very tip of your barrel. Second they eliminate damage to the very tip of your barrel. They taper your threads instead of choking them. If you're going to go to the trouble of thinning your own brass this is the thread protector for you. Second it allows you to keep tapping your own brass without having to buy another expensive thread protector or use a bulky cleaner. Specifications for Yankee Hill Machine .308 .625X24 Rifle Thread Protector .920 Outer Diameter: Manufacturer: Yankee Hill Machine Color: Matte Package Contents: Yankee Hill Machine .308 .625X24 Rifle Thread Protector .920 Outer Diameter Yankee Hill Machine YHM-3414-B: .308 .625X24 Rifle Thread Protector .920 Outer Diameter Matte