The Milwaukee Copper Tubing Cutter Wheel (4-Pack) is designed for fast, accurate cutting and longer blade life. Precision-machined for high performance when cutting copper pipe, the replacement wheel is made of hardened steel with a black oxide finish that resists corrosion and rust. The wheel's convex blade design reduces chipping for smooth, burr-free cuts. Use with the M12 Copper Tubing Cutter model 2471.