The Weld-On Copper Tube Cleaning Brush is a simple and effective tool for cleaning the outside of copper, brass, and plastic pipes. Made with durable steel bristles for highly effective scrubbing, this copper cleaning brush is an essential tool for removing corrosion from the outside of copper tubing. Notches around the outside of the plastic frame offer a secure place for your fingers to grip while you twist the brush to clean stubborn surface debris.