1For DIY Projects Joint: This drill bit set can be used to make the cabinet door frame, plane, even floor, wall panel, panel, table top and other DIY projects joint 2Clean Cut: The cut of this tongue groove router bit is very clean and everything is perfectly integrated, very practical 3Smooth Cut: Used for hand made drawers or other woodwork, the cutter can cut into materials smoothly, resulting clean, no debris 4Anti Backlash Design: Rugged carbon steel body adopt anti backlash design, bit accumulation and heat resistant PTFE coating protection 51/2in Shank Diameter: Shank diameter is 1/2in, blade is made of excellent quality alloy material, wear resistant and durable