Feature:1. [Countersink Drill Bit Set] This countersink drill bit set includes 5 different sizes, 1/4in, 3/8in, 1/2in, 5/8in, and 3/4in, catering to various drilling needs and applications.2. [Accurate Countersinking] Featuring 5 flutes and accurate countersink angle, these bits allow for quick and accurate countersinking, cleanly embedding screws.3. [HSS Construction] Constructed from high speed steel and treated with Ti coating, these countersink bits offer maximum hardness and durability, providing long lasting performance.4. [1/4 Inch Hex Shank] With standard 1/4 inch hex shank, these countersink bits can be easily installed on drill chucks without the need for additional adapters, suitable for most handheld and stationary drills.5. [Versatile Application] Suitable for drilling into various materials such as wood, metal, plastic, and more, this countersink drill bit set is versatile and ideal for woodworking, metalworking and other drilling tasks.Specification:Item Type: Countersink Drill BitMaterial: High Speed SteelShank Diameter: Approx. 6.35mm / 1/4inHead Diameter: Approx. 6.35mm / 1/4in, 9.52mm / 3/8in, 12.7mm / 1/2in, 15.9mm / 5/8in, 19.1mm / 3/4in.Package List:5 x Countersink Drill Bit1 x Storage Box