The .30 Caliber O-Ring Cleaning Jag is designed for effective bore cleaning and maintenance of .30 caliber firearms with O-ring construction for secure patch retention..30 Cal. Cleaning Jag with O-Ring DesignSKU: J30RPUPC: 689466088731O-ring system holds cleaning patches securelyPrecision machined for .30 caliber bore compatibilityEssential for proper firearm maintenance this cleaning jag ensures thorough bore cleaning and helps maintain accuracy and reliability of your .30 caliber rifles and firearms.