Size: Cutting height: 25mm (1"), Cutting diameter: 6.35mm, 7.96mm, 9.52mm, 12.7mm (1/4", 5/16", 3/8", 1/2") with top end shank: 6.35mm (1/4 inch). Premium Quality: Carbide cutters and steel shank. Premium C3 tungsten carbide cutters for long-lasting performance. Double-edged cutting design, excellent concentricity for fast, smooth and precise trimming cuts for laminates and templates. Build-up and heat-resistant Teflon coating can effectively prevent breakage or bending under high-speed working conditions. For use on CNC routers and other automatic routers, as well as portable and table-mounted routers. Scope: wood, solid wood, MDF, acrylic, particle board, plywood, etc.