The Pro-Shot Products J12 Shotgun Jag is your ultimate solution for a quick and thorough shotgun cleaning. This tool, designed with a brass spear tip, easily engulfs the entire interior of the barrel when covered with a patch, ensuring top-notch cleaning.Key features include a #5/16-27 thread, and for your convenience, the size is prominently stamped for easy identification. This model is specially designed for compatibility with your 12 gauge.