Features 1/2" Shank 3 Flute Industrial Quality C3 Tungsten Carbide Cutters Solid Hardened Steel Body Anti-Kickback Design Build-Up Resistant Coating Lifetime Satisfaction Use the Yonico 15134 router bit to create various sized joints from a tongue and groove joint of only 12mm (0. 47") high to a full box joint up to 40mm (1. 57") high or even up to 80mm(3. 15") high when flipping over the stock. Cutting depth is 1/2". To achieve the best finish on a corner joint use stock with a thickness less than 1/2". Once assembled the protruding tongues should be sanded flush with the box sides. 1/2" Shank & 5/64" thick carbide.