Brownells .54 Caliber #10-32 Male Double-Tuff Bore Brush, Pack of 12

The extra-thick, kinked phosphor bronze wire provides the intense scrubbing power needed to break through the toughest fouling in your bore. It may take a bit of effort to push it through, but the deep-clean results speak for themselves. These heavy-duty phosphor bronze bristles are tough on carbon deposits yet safe for your bore, offering powerful cleaning without scratching. Phosphor bronze bristles with enhanced thickness Precision-engineered steel, meticulously looped and expertly wound to form a robust shank structure