The Cal-Van Tools Constant Pressure Tube Cutter, No. 157, utilizes a spring to keep consistent compression on the cutting blade to the tube. This allows the user to cut through thin-walled steel tubing without having to continually tighten or readjust the cutter. Users simply turn the adjustment handle until the alignment marks line up, then turn the cutter to until the tubing is cut. This tool makes the task of cutting through steel walled tubing faster and easier, and features a replaceable blade. Users can cut a range of tubing sizes from 3/16" to 7/8".