Reed Tool 2PK-3-6PVC Cutter Wheels for Tubing Cutters, 2-Pack Blade Exposure: 0.377" Blade Exposure: 9.6 mm For use on 3"-6" PVC; 4" Heavy Wall; CPVC Fits Reed TC3Q; TC4Q; TC5Q; TC6Q Made from high shock-resistant tool steel on CNC machines and then heat treated