Hoppe's boresnake is the fastest bore Cleaner on the planet. One pass loosens large particles, scrubs out the remaining residue with a bronze brush, then swabs it all spotless with a cleaning area 160x larger than a standard patch. Add a few drops of hoppe's no. 9 lubricating oil or hoppe's elite gun oil and your gun's ready for storage. Features: - the world's quickest, three-step bore system. - extremely packable. - available for rifles, shotguns and pistols. - brass weight on the pull cord is stamped with the size. - machine washable. - patented one-piece design. Specifications: - fits: rifles - caliber: .17 Cal. Center fire & .17HMR.