Brownells .40 Cal/.41 Cal/10mm #8-32 Male Heavy Weight Bore Brush, Pack of 3

The highly aggressive nylon brush efficiently removes stubborn bore deposits. Its extra-stiff, large-diameter bristles are safe for use on both rifled and smoothbore surfaces. The brush is resistant to deterioration when used with your preferred solvent. Additionally, the robust, one-piece, looped and wound brass shank and coupling are designed to prevent scratching. High-density nylon bristles Brass, looped and wound shank Compatible with 8-32 internal threaded components