The large diameter end bores holes to allow nail or screw heads to enter the slot, and the smaller diameter allows room for the shank of the nail or screw. Cuts all composition materials, plywoods, hardwoods, and softwoods. Use on CNC and other automatic routers as well as hand-held and table-mounted portable routers.
Item Number: 70-104 25/64in. (Dia.) Key Hole Bit with 1/4in. Shank Ideal For: Cut openings in siding & paneling Machine Use: Router Materials: Wood Overall Diameter 25/64in. Bearing Diameter Carbide Height 7/16in. Radius Large Radius Angle Shank Diameter 1/4in. Overall Length 1-5/8in.