Shooter's Choice, Shooters Choice Bore Brush, 3", .30 Cal, 8-32 Threads, Bronze WARNING Warning WARNING WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. Cleans: .30, .30-06, .30-30, .303, .308, 300 Win Mag, .32, 7.62mm, 8mm Length: 3 Inch Thread: 8-32 Includes: 1 Bronze Bore Brush Product Description Shooter's Choice bore brushes feature phosphor bronze bristles and a brass stem that work together to offer an effective clean without damaging your barrel. Each brush is stamped with the brush size on the stem to allow for easy identification. Shooter's Choice brushes are outfitted with standard 8-32 threads.