IVY Classic Industries is dedicated to producing a comprehensive, quality line of power tool accessories and hand tools. IVY Classic Cobalt Advantedge (Registered Trademark) Variable Pitch Bi-Metal hole saws are designed for outstanding cutting performance and feature an M-3 cutting edge and a thick backing plate. These outstanding saws are available in a range of diameters and cut stainless and mild steel, non ferrous metal, plastic and wood.