Hinged Cutters feature four wheels to cut steel, stainless steel, cast and ductile iron with only 90 degree to 110 degree handle swing. Only 4in. (125 mm) clearance is required around pipe. Strong guide fingers ensure perfect wheel alignment for square cuts. A closed 360 degree frame on the hinged cutter forces all energy into cutting the pipe for maximum efficiency. There is no shower of sparks in this cold cut. has the only hinged cutter that tracks every time and the only one recommended for ductile iron, steel, and stainless steel to Schedule 100. This tool is a invention.