For fast, efficient cutting in steel, iron, aluminum, steel plate, pipe and stainless steel up to 3/16" thick. Tungsten carbide cutters hold up to tough use and have superior heat resistance. With 3/16" depth of cut and built in saftey collar. Ejector spring assists with plug removal. 3/8" shank for sizes up to 2-1/2"; 1/2" shank for sizes 2-9/16" and up.