(Slotting Cutter Tool Size) Suitable for 5/16 (8mm) shank hand drills, bracket motor drive drills. Length of cutting diameter: 7.93/9.52/12.7mm. (Milling shank milling cutter) High quality T type straight edge blade, sharp edge, high hardness, precise positioning, high precision, smooth cutting. (Efficient cutting) High quality YG6 carbide blade with sharpness, high hardness, precise position, high precision, smooth cutting, impact resistance, high toughness and not easy to break. br /> (Excellent design) These 5/16 router shank cutters are suitable for solid wood panels, MDF, chipboard, designer profiles, for smooth and careful cuts as well as for the production of stylish furniture. Also suitable for milling grooves on frames, signs, clocks, pylons and other wall tools to create keyhole hangers or grooves for cables. (Application) Used for solid wood, waterproofing panels, plywood and ecological panels. Ideal for milling recesses in frames to create keyhole pendants or for making recesses for electrical cables Function: Ultra-thin cutting tools made from industrial grade hard metal. Alloy blades are high-quality welded, with stable quality and high efficiency. Integrated hardened body with anti-kickback design. Strong and heat-resistant PTFE coating Coating heat resistant to prevent buildup of wood chips, resin and asphalt. Specifications: Blade material: ultra-thin hard metal. Housing material: hard metal tip. Tool holder size: 8mm Package includes: 1 x 5/16" Shank Router Bit 1 x 3/8" Shank Router Bit 1 x 1/2" Shank Router Bit