Great tool to have when you don't have enough swing room to use a full size tubing cutter. You can cut copper tubing with less than 1" of clearance. Quicker than conventional cutters. Just snap it on the tube and turn it in either direction. The cutter wheel automatically tightens as you turn the autocut, no knobs to twist. The cutter wheel is spring loaded to provide a constant cutting pressure. Long-lasting hardened steel cutting wheels.