Quick Release™ Tubing Cutters are the best tracking, easiest cutting tubing cutters available. Cut copper, aluminum, light wall steel and stainless steel tubing. With alternate wheels they will cut a wide variety of plastic pipe and tubing, including muffler systems tubing. TC1Q, TC1.6Q and TC2Q sliding bars are die-cast zinc aluminum for greater strength. Each of these three also features a built-in reamer and spare cutter wheel in the knob. Long-proven TC3Q and larger models with steel sliding bars withstand professional workloads over the long haul.