Superior cutting power and durabilityMade of classic high speed steel with excellent hardness of HRC 62-64, sharp and wear resistant, high strength and toughness, easy drilling with higher efficiency. This precision milling cutter with a chamfered flute design provides faster operation and self-cleaning of chips. 82 standard angleThe angle of the cutter is 82 degrees, which matches the 82 degree screws you have in your workshop. MultifunctionalDifferent sizes of countersink drill bits (#5, #6, #8, #10 or #12) can be adjusted for different drilling depths to meet different needs. Suitable for drilling sink holes in various materials such as wood, PVC plastics, including fiberboard, particle board, plywood, plastics, PVC, rubber, etc. Efficient and practicalThe 1/4 inch shank is compatible with most rotary tools and can be used with impact drills and other power tools. Hexagonal handle design allows quick chuck changes and more stable clamping effect. Wooden cork cutter setMade of durable carbon steel, the sharp drill bit (size: 1/4", 3/8") can easily penetrate corks, and they work best when paired with counterbore bits. They can be used for plug or dowel buttons.