The 12 Gauge Wool Bore Mop by Brownells is designed for thorough cleaning and oiling of shotgun barrels, with a natural wool construction that conforms to rifling grooves.
Constructed with a looped and twisted brass shank and coupling, the mop is gentle on the bore and will not cause scratching during use.
Specifically made for universal shotguns in 12 Gauge, the mop has a length of 2-7⁄8" (7.3cm) and features a 5⁄16"-27 thread for easy attachment.