Otis Technology, Pierce Point Jag, For 9MM, 8-32 Threads, Brass WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. Cleans: 9mm Thread: 8-32 Includes: 1 Solid Brass Jag Made in the USA Product Description Otis Technology 9mm solid brass, pierce point jags are caliber specific to ensure a proper fit between the patch and bore and are designed for use with 8-32 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.