Bore Brushes Stainless Steel (8-32 Threads) - Pistol, .40-.45/458 cal/10mm Premium brushes loosen fouling without leaving polymer residue. Brush diameter is precisely designed to assure complete bore coverage. Bristles are chemical resistant for durability and the precision-engineered loop-core protects muzzle, chamber and rifling. Gunslick® Pro provides high quality, precision-engineered cleaning tools to keep your firearms in pristine condition. View our caliber-specific brushes for adequate scrubbing without bore damage. For: .40-.45/458 Cal/10mm Pistol 8-32 Threads Stainless Steel Loosen fouling without leaving polymer residue Loop-core protects muzzle, chamber, and rifling