Shooter's Choice solid brass, pierce point jags are caliber specific to ensure a proper fit between the patch and bore and are designed for use with 5/16-27 thread cleaning rods. The pointed design keeps your patch centered and allows it to fall off easily once the jag exits the muzzle. The solid brass makeup means that the jag will not scratch or damage your firearm. The included felt pad aids in acheiveing a superior clean. Cleans: 20 GA Thread: 5/16-27 Includes: 1 Solid Brass Jag and one felt pad Made in the USA