DEWALT offers a full range of standard and quick change mandrels for versatility in a wide range of hole saws. DEWALT bi-metal hole saws are among the fastest-cutting, longest-lasting hole saws available anywhere. Each has a double-tooth design and sharper tooth geometry to cut faster and cleaner through a variety of jobsite materials, including wood, metal and plastics. Its extra-thick, hardened backing plate prevents thread stripping, and the deep-cut design easily saws through 2-by lumber in a single pass.