Features an enclosed feed screw to eliminate clogging and jamming, grooved rollers for close-to-flare cuts, and a fold-away reamer. X-CEL® Knob cuts tubing more quickly and easily with our larger, more ergonomic designs. X-CEL Wheel Pin – changes your cutter wheel quickly using a new ball detent design…no tool needed…no lost clips! Spare cutter wheel included in the knob. Cuts copper, brass, and aluminum tubing and thin-wall conduit.