Get a low price on the Reed Manufacturing O Cutter Wheel for Copper/Steel at PlumbersStock. This cutter wheel has a .18 capacity. It is designed to cut copper, aluminum, brass, and steel tubing. The cutter wheel fits the following models of cutters like TC1Q, TC1.6Q, TC2Q, T10, T15, T20, MC3, RT15T1, RT15T2, RT15T3, RTC1.1, and RTC1.4. Reed won't disappoint. Their products are made with integrity and will deliver.