Century 5705 Impact Pro Arbor Attached Hole Saw Set, 5-Piece 5 Piece set includes 3/4-Inch 7/8-Inch 2 each of 1-1/8-Inch and 1-3/8-Inch Bi-Metal arbor attached hole saws Bi-metal construction and variable tooth design for optimal performance in impact devices Plug ejecting spring for efficient hole drilling For cutting wood metal plastic and fiberglass 5/8-Inch cutting depth with 1/4-Inch attached arbor