The Do it Best 8-Piece Bi-Metal Hole Saw Set features a universal quick-change design with an angled slot for fast, easy plug removal. Built with durable bi-metal construction and 8% cobalt for increased wear resistance, this hole saw is perfect for cutting through metal, plastic, and wood in various applications. This 8-piece set includes (6) bi-metal hole saws in 1", 1-1/4", 1-1/2", 1-3/4", 2", and 2-1/2" with (2) pilot drill bits, (1) small arbor, and (1) large arbor.