The Pistol Viper Bore Snake is a braided nylon, pull-through cleaning cord that scrubs, cleans, and lubricates in a single step. The Pistol Viper is just like the original Bore Snake, with 50% more scrubbing surface for those extra-tough cleaning jobs. Calibers: .22, .30, .32, 9mm, .357, .380, .38, .40, .41, .44, .45 Simply apply bore cleaner to the front of the cord, oil to the end, drop the weighted end down the bore, and pull through. The cone-shaped, nylon bore guide on the lead end protects your gun's rifling. Extra, built-in bronze brushes and braided cord clean and oil the bore in a few passes. Washable and reusable with "den" case for storage. Mfg: Hoppes