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.
• Ideal For: Cut openings in siding & paneling
• Machine Use: Router
• Materials: Wood