Product description 45 Degree Lock Miter Router Bit: Size:1/4-Inch Diameter of the stem: 1/4 inch(6.35mm) Blade diameter: 2 inch(51mm) Applicable to the size of the board: 12.7-19mm Diameter of the stem: 1/4 inch(6.35 mm). Width of the teeth: 1/4 inch(6.35mm). Depth of teeth: 1/2 inch(12.7 mm). Applicable to the size of the board: 13-19mm. Maximum speed: 12000 Colour:Yellow+black+silver Material:carbide alloy Package Contents: 2 * Three-blade T knife 1 * 45 degree tenon knife Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.