The core is a single piece of brass wire that passes through the threaded brass coupler, guaranteeing that the core will never separate from the coupler in the barrel.
Bristles are made from high-quality bronze, which is much softer than barrel steel but more than aggressive enough to scour away lead fouling, copper fouling, and powder residue.
Each brush contains the maximum number of bristles that can be inserted for the caliber, 20% more than standard brushes! All components are non-marring.

3 pack