Description: Highly sharpen, sharp cutting smooth, no burr Unique head design, chip removal more smoothly The stacked rail and stile router bit will cut both rail and stile in a cove design High abrasion resistance, high-precision grinding technology, superior abrasion resistance, strong, durable and with long service life Purposes: for wooden door frames, wooden window frames, cabinets frames tenon together Specification: Material: Carbide Color: Yellow Shank Diameter: 1/2" Length: Approx. 8cm/3.1inch Package Includes: 1pc Biscuit Jointing Router Bit Note: Please allow 1-2mm measurement error and color difference