Brownells .375 Cal #8-32 Male Double-Tuff Bore Brush, Pack of 12

The extra-thick, kinked phosphor bronze wire provides the robust scrubbing action necessary to effectively remove the most challenging debris from your bores. While significant force may be required, the results are highly satisfactory. The bristles, made of extra-thick phosphor bronze, are designed to prevent scratching of the bores. This tool is excellent for eliminating persistent carbon deposits. Phosphor bronze bristles with enhanced thickness Precision-engineered steel, meticulously looped and expertly wound to form a robust shank structure