Feature:1. Better Design: Self starting point and 5 flute design reduces vibration, making the operation smoother and the cutting cleaner.2. Broad Utility: Allows for application on wood, plastic, soft metal, fibreboard, particle board, plywood, aluminium board, etc.3. 5Pcs in Total: Comes with 5pcs countersink drill bit in different specifications, which will meet your various working needs.4. Good Material: Made of heat treated and tempered high speed steel, ensuring easier drilling with higher accuracy and less burrs.5. Easy to Install: Standard 1/4in hex shank enables quick changing, also has an adjustable anti sleeve depth, easy to install.Specification:Item Type: Countersink Drill BitMaterial: High Speed SteelHandle Feature: 1/4in Hex ShankDrill Diameter: Approx. 1.98mm / 0.08in, 2.38mm / 0.09in, 2.78mm / 0.11in, 3.175mm / 0.13in, 3.56mm / 0.14inSpecifications: #5, #6, #8, #10, #12.Package List:5 x Countersink Drill Bit1 x Hex Wrench