Otis Technology Bore Brush 8-32 Thread .40 Cal 341. The bristles of these cleaning tools are corrosion resistant and less prone to falling out thanks to their Tufcor proprietary core wire and tighter twist design. All cleaning chemicals are welcome on these Otis Technology cleaning tools and they feature a cold-welded stem for extended durability. Otis Technology has made these Otis 8-32 Thread Bore Brushes superior with twice the fill of their competitors' brushes and each bristle is filled completely to the end. 8-32 threads on the cleaning brushes allow you to attach the brushes to virtually any cleaning rod including the popular Memory-Flex rod from Otis Tech. The specific caliber of each brush is stamped to the stem for easier organization; you can purchase bore brushes for .22 caliber rifles and pistols all the way up to .50 caliber weapons. For unmatched bore cleaning capabilities for your rifle or pistol pick up Otis Tech 2 Inch Bore Brushes. Specifications for Otis Tech 2 Inch 8-32 Bore Cleaning Brushes: Length: 2" Thread Size: 8-32 Weapon Type: Rifles and Pistols Caliber: Available for .22 .25 .27 .30 .35 .38 .40 .45 and .50 caliber Features of Otis Technology Handgun and Rifle Bore Cleaning Brushes: Thoroughly cleans bore of handguns and rifles Tufcor proprietary core wire Brushes filled all the way to end with twice the fill of competitors' brushes 8-32 threads Caliber or gauge stamped on brush stem Cold-welded stem Better bristle retention with tighter twist Available for .22 .25 .27 .30 .35 .38 .40 .45 and .50 caliber rifles and pistols Package Contents: Otis Technology Rifle and Pistol Bore Brushes