When the need arises to cut small diameter tubing 1/8'' to 1-1/8'' (3 - 28mm) be it, hard or soft copper, aluminum, brass, thin wall steel and stainless steel this is the tool to use. Carbide steel wheel cuts to within 1/4'' from the end of the tube. Pivoting reamer blade for cleaning tube ends swings out of the way when not in use. An extra hig-carbon cutting wheel is included which stores under the reamer.