Bi-metal hole saw,M3/M42 bi-metal construction for heavy duty cutting, cutting depth to1- ... 3/8"(35mm)and1-7/8"(47mm) Bi-metal hole saw,M3/M42 bi-metal construction for heavy duty cutting,cutting ... 35mm)and1-7/8"(47mm)Product name: Bi-metal hole saw*M3/M42 bi-metal construction for heavy duty cutting*cutting depth ... nail-embedded wood, hard wood floors, plywood and plastics DF06014 Bi-metal hole saw