[ High precision and high strength ] - Made of strong, durable tungsten alloys, the high quality router bit ensures professional and ultra-precise machining on wood. [ Long working life - Clean cutting, smooth rotation, fast operation, high hardness, good wear resistance, greatly improve the life of using. [ Anti-kickback solid design ]- Steel body hardened with anti-kickback balanced design with high quality guide and bearings. [ Stem diameter: 8 mm ] - Blade diameter: 12mm; Blade length: 13 mm mm mm. [ Usage ] - For handcraft or woodworking; MDF, solid wood, particle board, wooden door frames, wooden window frames, cabinets and boxes. Features: Stable quality ,high efficiency Blade Flush Trim Patter with Top and Bottom bearings Router Bit. Carbide Tipped - Micro grain grade provides increased strength and utmost esistance. Heat-resistant coating baking to prevent the accumulation of wood chips, resin and asphalt. Specification: Material: Carbide Tipped Blade length: 13mm, 20mm, 25mm Color: Black, Yellow, Blue Package included: 3 sizes X Grooving Cutter