Bore Tech's double wound Brass Brushes are known for being the finest brushes available. This is due to superior construction and engineered features incorporated into the bursh. Our premium Brass Bore Brushes have twice the amount of phosphorous bronze (brass) bristles compared to the competition, resulting in double the "scrubbing action" and faster cleaning. Each brush core is cold welded to the brass coupler and the brush bristles are filled to the end. This attention to detail is necessary to produce and effective, long lasting, high quality Brass Bore Brush for your rifle or pistol.