- 17-20 caliber is 5-40 threaded
- 22-50 caliber is 8-32 threaded
- 10-28 gauge & 410 Bore are 5/16-27 threaded
- Will fit most brands of cleaning rods
The core of the Bronze Bore Brush is a single piece of wire that is looped on the end and a crimped coupler, so it will not scratch your bore. The bristles are made from premium phosphor bronze, for more power and long life.