Breakthrough Clean BT357389PBBB Phosphorus Bronze Bore Brush

Breakthrough Clean Phosphorous Bronze Bristle Bore Brush is durable for effective cleaning without damaging your bore. The twisted brass core keeps brush rigid and has a deeper cleaning action than Nylon brushes. Standard #8-32 thread (standard shotgun #5/16-27 thread on .410/28g/20g/12g) One per package.