SIZESuitable for 5/16 (8mm) shank hand drills, holder motor drive drills. cutting diameter length: 7.93/9.52/12.7mm. MATERIAL This product uses YG6 hard alloy with sharp edge, high hardness, precise positioning, smooth cutting and impact resistance. APPLICATION These 1/4 shank cutters are suitable for solid wood panels, MDF, chipboard, design profiles, for smooth and careful cuts as well as for the production of stylish furniture. They are also suitable for milling grooves on frames, panels, clocks, pylons and other wall tools to create keyhole hangers or to create grooves for cables. FEATURESHard alloy blade has high quality welding to provide stable quality and high output, without worrying about broken and sloping problems during your work. The blade is sharp and durable, adopts arc curve design, advantageous to remove, punching is more efficient. INCLUDE LIST Scope of delivery: 1 x T-slot cutter for 1/2" hex screws; 1 x T-slot countersink for 3/8" hex screws; 1 x T-slot countersink for 5/16" hex screws. SPECIFICATIONS:Length: 46mm Material: YG6X carbide Diameter shank: 12.7mm, 9.52mm, 7.93mm 1 x T-slot cutting tip for 5/16" hex screw 1 x cutting tip T-slot cutting tip for 3/8" hex screw 1 x T-slot cutting tip for 1/2" hex screw Cutting edges made of hardened carbide (carbide YG6X). With clean cutting, even rotation, torsion resistance and strength. Precisely ground shank for stable hold in the pliers. Regular rotation, good wear resistance and long life. The coating of the milling bodies allows better chip evacuation and reduced friction. Diameter Shaft: 6.35/8mm, suitable for most brands of machines with 6.35/8mm shaft support.