Models 151-156 feature a quick-acting design, I-beam construction, hardened wear surfaces and thrust bearing slide assemblies for smooth operation. X-CEL® Knob cuts tubing more quickly and easily with a 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! Available in models for plastic pipe or metallic tubing. Models 151 and 152 feature fold-away reamers.