Brownells 20 Gauge 5/16-27 Male Standard Line Bore Brush, Pack of 3

For bores that are severely leaded, fouled or rusted, the stainless steel bore brush offers a robust cleaning solution. Its aggressive cleaning action is highly effective in restoring cleanliness to even the most challenging conditions. However, users should be aware that this aggressive action can accelerate wear and potentially reduce the lifespan of the barrel with regular use. Therefore, it is recommended to use the stainless steel brush judiciously to balance effective cleaning with the preservation of the barrel's longevity. Precision-engineered steel, meticulously looped and expertly wound to form a robust shank structure Male threads with a 5/16-27 unified national special (UNS) specification