The Rifle Bore Snake scrubs and cleans the bore of your rifle in a single step. The built in, bench-quality phosphor bronze brush and braided floss scrub, clean and oil the bore in just minutes.  Apply a few drops of bore cleaner to the front of the cord and oil to the end. Drop cord into the bore and pull through five times. Calibers: .17, 5.56mm, .22, .223, 6mm, .240, .243, .244, .257, .264, 7mm, .270, .284, .280, .380, .30, 8mm, .32, .338, .340, .35, .375, .416, .460, .50, .54, .204 The Rifle Bore Snake is washable and reusable and the lightweight design folds neatly away in new "den" carrying case for easy storage.