Designed for versatility and convenience, the Master Bi-Metal Hole Saw Set is a complete collection of 10 of the most commonly used hole saw sizes, as well as 2 quick change mandrels for rapid blade exchange. These saws can drill up to 1-3/4 in. and can cut 2-by lumber in one pass with the extended hole design. The patented toothforms remove chips quickly and offer extended bit life. The bi-metal construction and high-speed steel edges are engineered for effective work on wood, metal, and plastic. A larger continuous slot makes for easier plug ejection and removal, and hardened backing plates work to avoid thread stripping.