This 1" diameter, 1/2" cutting depth Tungsten Carbide Tipped Cutter is the superior alternative to bi-metal holesaws and oversized drill bits. They cut faster, cleaner, and longer than conventional holesaws. T.C.T. cutters are the standard for electrical construction, transit work and general metal fabrication. The spring on the pilot bit ejects the cut slug. I have one of these cutters in my tool bag and have cut countless holes in junction boxes with it. This is the cutting tool of choice for hand held or drill press cutting of multiple holes. They are especially effective when cutting stainless steel. Say goodbye to burnt out, smoking holesaws. Try a T.C.T. you'll love it.