Designed for the versatile, demanding craftsman, DeWalt's convenient Master Hole Saw Kit combines all the trade specific tools from DeWalt's Plumber's Hole Saw Kit, Electrician's Hole Saw Kit, and Door Lock Installation Kit in one convenient, compact injection molded kit box. At the heart of this kit are hole saws in 3/4-, 7/8-, 1-, 1-1/8-, 1-3/8-, 1-1/2-, 1-3/4-, 2-, 2-1/8-, 2-1/4-, and 2-1/2-inch sizes. Each of these tools features a double tooth design for strength and durability, a special deep-cut geometry for fast, effective cutting, and thick, hardened backing plates to prevent thread stripping and ensure a long life. The small and large quick-change mandrels in this kit help ensure easy set-up and improved productivity. And, like all DeWalt hole saw kits, the Master Kit comes with replacement parts, including two valuable Pilot Point centering bits, so that you can perform maintenance quickly and get back to work.