The "SPECIAL LINE" Brass Core Bore Brush by Brownells is designed to prevent scratching of the barrel with its one-piece, looped and wound brass shank and no-scratch brass coupling.
It features high-quality phosphor bronze bristles for effective cleaning and durability, suitable for .410 bore shotguns.
This product comes in a 3 pack, with a 2-7/8" (7.3cm) overall length and 5/16-27 thread, specifically tailored for shotguns.