High Speed Steel M3 / M42 Bi-Metal Edge Welded to Alloy Steel Beck for Heavy Duty Cutting. Veriable Teeth 4/6 TPI Teeth. Cutting Safely and Efficiently,the Best Way to Cut Large Holes, Clearing the Chips in Touch Materials. Diameters from 9/16" - 7-7/8"(14-200mm). Cutting Depth to 1-3/8"(35mm) and 1-7/8"(47mm). Can be Used in Portable Electric or Pneumatic Tools, Vertical Drill Machines, Lathe, Boring/Milling Machines and Other Machine Tools. Cuts Through Stainless Steel and Other Materials Pipe, Nail-Embedded Wood, Hard Wood Floors, Plywood and Plastics. All the specifications for arbored hole saws are the same as hole saws. There is anextra charge for the pilots on the arbored hole saws.