SIZESuitable for 1/4 (6.35mm) shank hand drills, stand motor drive drill bits. 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.APPLICATIONThese 5/16 Shank Cutters are suitable for solid wood, MDF, particle board, design profiles, for smooth cuts and meticulous 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.&nbsp ;FEATURES The 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.