KleenBore® Phosphor Bronze Bore Brushes 3 PACK ✔NEW ✔Low Price ✔FREE U.S. Shipping ✔Authorized Dealer Precision made for safe, effective removal of metal fouling and powder residues. Features straight (rather than crimped) wire bristles for more effective cleaning power. Handgun and rifle sizes have #8-32 thread size;Shotgun sizes have #5/16-27 thread size;Smallbore size has #3-48 thread size.