IVY Classic Industries is dedicated to producing a comprehensive, quality line of power tool accessories and hand tools. IVY Classic Premium Swift bore (Registered Trademark) Hole Saw Arbors with 1/4-Inch pilot drills adapt 5/8-inch through 1-1/8-inch hole saws for use with power drills. These arbors and pilot drills are designed for their outstanding drilling performance and efficiency. They drill a variety of materials such as stainless and mild steel, nailed wood and plastic and the convenient set screw allows for easy pilot drill replacement. These arbors have a standard 1/2-inch - 20 thread and are compatible with all hole saws using the same thread size.