This top bearing slot cutter router bit routes a 1/16 H x 3/8 D slot. The overall diameter is 1-1/4 and 1/4 shank. Highlights: - Cut slots and grooves for joinery and other general use - Premium C3 micro-grain tungsten carbide blades for a sharper & longer lasting edge - For use on table mount and handheld router - Silver induction brazing for maximum strength and durability - Shank bearing design allows you to use a handheld router to slot floor boards and decking without interfering with the sub floor or deck joists - Manufactured with anti-kickback design to help prevent workshop mishaps Item Includes: 1 Router Bit Top bearing slot cutting router bits are specifically designed for on-site deck board slotting to be used in conjunction with hidden deck board fasteners. The bearing's position allows for easy slotting on deck boards that are already positioned on the deck beams. There is no protrusion at the end of the bit that will interfere with any underlying wood.