The Milwaukee Hole Dozer with Carbide Teeth Large Diameter Hole Saw features a new 3 TPI design that offers fast cuts with the durability of a bi-metal hole saw and life of a carbide hole saw. This Milwaukee hole saw provides the longest life in general purpose and extreme materials with the ability to cut through stainless steel， cast iron， fastener embedded wood， cement board， fiberglass， plaster， asphalt shingles， and more with ease. The new slot design also provides increased pilot visibility for accurate placement and faster chip ejection keeping cuts cool.