SIZESuitable for 5/16 (8mm) shank hand drill bits, stand motor drive drill bits. cutting diameter length: 7.93/9.52/12.7mm.MATERIALThis product uses YG6 hard alloy with sharp edge, high hardness, precise positioning, smooth cutting and impact resistance.APPLICATIONThese cutters 1/4 shank are suitable for solid wood panels, MDF, chipboard, design profiles, for smooth and precise cuts as well as for the production of stylish furniture. They are also suitable for milling grooves on picture frames, panels, clocks, pylons and other wall tools to create keyhole hangers or to create grooves for cables.FEATURESThe hard alloy blade has high-quality welding to provide stable quality and high efficiency, without worrying about broken and sloping problems during your work. The blade is sharp and durable, adopts arc curve design, advantageous to pull out, punching is more efficient. 1 x T-slot cutter for 1/2" hex screws; 1 x T-slot cutter for 3/8" hex screws; 1 x T-slot cutter for 5/16 hex screws.