D. B. Shah and Brothers offers Bi-Metal Hole Saw Blades. D. B. Shah and Brothers also manufactures Hydraulic Torque Wrench, Lawn Mowers, Torque Wrenches, Saws, Precision Tools and Pipe Plumbing Tools of Drain Cleaning Equipment. The Bi-Metal Hole Saw Blades are used to cut any wood, metal or plastic in either a hand -held drill or a drill press.