Our Breakthrough Clean Technologies® Brass Patch Holders hold patches securely for application of Breakthrough Clean Technologies® solvents and lubricants. Fits .30 & .308 caliber & 7.62mm barrels. #8/32 thread for attachment to Breakthrough Clean Technologies® stainless steel rods and cables. Product Features • GUN CLEANING SUPPLIES: This high-quality tool fits .30 & .308 & .357 & .38 & .40 & .44 & .45 Cal & 7.62 & 9 & 10 mm barrels & securely holds gun patches for applying solvents & lubricant