Shank Diameter: 6mm, Cutting Diameter: 1/4", 5/16", 3/8", 1/2", Cutting Height: 13/16", 1-1/16", 1-3/16", 1-3/16", 1-7/32". Industrial grade C3 micro-grain carbide router bits with double-edged cutting design, high performance, sharper cutting. Build-up and heat resistant Teflon coating can effectively prevent breakage or bending under high-speed working conditions. Flush trim cutter with top end bearing, ideal for fast, smooth and accurate cuts for laminates and jigs. Use on CNC and other automatic routers as well as table-mounted and hand-tensioned portable routers, ideal for cutting all composite materials, plywood, hardwoods and softwoods. Features: Industrial grade micro-grain tungsten carbide router bit C3. Solid hardened steel body with anti-kickback design. Heat and build-up resistant Teflon coating. Baked on heat resistant coating prevents build-up of sawdust, resin and pitch. Industrial grade tungsten carbide blade. High hook and shear angles allow the cutters to slice smoothly, producing clean, splinter-free material. Specifications: Color: Blue Body Material: Solid hardened steel Blade Material: C3 Micro Grain Tungsten Carbide Max RPM: 12000 Contents: 1/4" * 6.35mm Flush Trim Router bit 1/4" * 7.96mm Flush Trim Router bit 1/4" * 9.52mm Flush Trim Router bit 1/4" * 12.7mm Flush Trim Router bit