Four wheels cut steel, stainless steel, cast and ductile iron with only 90 to 110 handle swing. Only 4 clearance required around pipe. Strong guide fingers insure perfect wheel alignment for square cuts. A closed 360 frame forces all energy into cutting the pipe for maximum efficiency. There is no shower of sparks in this cold cut. This is 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 Reed invention.