Feature: 1. Fast Drilling: With the woodworking drilling bits you will find your work easier and more efficient. 2. Various Sizes: Comes with 5pcs countersink drill bit with 5mm 6mm 8mm 10mm and 12mm blade diameter. 3. Extended Bits: Extended tip will not only make the working quicker but also enables cleaner cutting. 4. Broad Utility: Applied for the screw countersinking and hole drilling on wood aluminium alloy etc. 5. Good Material: Forged with high speed steel material with great hardness very durable with wearing. Specification: Item Type: Countersink Drill Bit Material: High Speed Steel Blade Diameter: Approx. 5mm / 0.2in 6mm / 0.24in 8mm / 0.31in 10mm / 0.39in 12mm / 0.47in Shank Diameter: 1/4in Hex Shank Application: Used for wood aluminium alloy screw countersinking and hole drilling. Package List: 5 x Countersink Drill Bit 1 x Drill Bit