Description: High-grade welding, stable quality, high efficiency. Using for kinds of woodworking. Totally enclosed and lubricated . Carbide Tipped - Micro grain grade provides increased strength and utmost resistance. Made of high quality metarial, durable and stable. Specification: Color: Yellow Material: Alloy Shank diameter: 6mm / 0.24inch Bearing diameter: Approx. 12mm(0.47inch) Blade length: Approx. 7mm (0.27") & 14mm (0.55") & 20mm (0.78") Total length: Approx. 57mm (2.24") & Approx. 65mm (2.56") & 68mm (2.67") Package Includes: 1 Set of Trim Router Bit(3 Pack)