Mini for cutting copper, aluminum and mild steel tubing in confined areas. Durable epoxy powder-coated finish for corrosion-resistance & durability. Large, knurled knob and rollers allow easy tightening. One piece knob & screw means no losing pieces. Heat-treated alloy steel cutting wheel. Replacement cutter wheels: #42835 (cu, al, brass) & #42836 (PVC, CPVC, abs)