The Ryobi 5-Piece Hole Saw Set contains 4 carbon whole saws and a tapered brad point pilot bit for drilling into wood. The whole saws feature a deep cup that allows the user to cut through all 2X material in one pass and also have an aggressive tooth design for any encounters with nails while cutting. The ejection slots on the hole saw allow for easy plug removal. This set is compatible with the Ryobi Speed Load plus system of drilling. Includes 1 1/4 in., 1 1/2 in", 2 in. and 2 1/8 in. an arbor with center drill bit and an Allen wrench