General description Professional woodworking tool designed for precision cutting, featuring a keyhole cutter set with a 6.35 mm shank and cutter diameters of 5/16", 3/8", and 1/2". Ideal for creating T-slots for hex head screws, this milling cutter produces clean cuts with minimal need for re-sharpening. Technical specifications Shank diameter: 6.35 mm Cutter diameters: 5/16", 3/8", 1/2" Blade material: C3 micro-grain carbide Body material: High-quality alloy steel Coating: Heat-resistant Teflon Compatibility and accessories Suitable for solid wood, particle board, MDF, plywood, etc. Installation Designed for use with handheld and table-mounted routers. Not compatible with electric drills. Usage Ideal for creating T-slots and keyholes in various wood materials. Produces clean cuts with minimal re-sharpening required.