Features: Experience precisions and efficiency with our Adjustable Tapered Countersink Drill Bit, crafted from durable alloy steel for high hardness and wear resistance, ensuring sharpness and longevity in every use. Featuring a adjustable positioner with a range of 2.5-10.5mm, this drill bit is designed for precise processing, equipped with twist chip flute design to prevent chip accumulation and enhances work efficiency. Ideal for both professional craftsmen and DIY enthusiasts, this countersink drill bit caters to anyone seeking reliable and accurate woodwork result. Perfect for various woodworking projects, including installations on wood, particle board, and decorative panels, making it a multifunction tool in any workshop or home setting. Compatibles with electric hammer, impact drills, and hand electric drills, the 8mm shank ensures easy clamping and quick tool changes, enhancing your workflow seamlessly. Specifications: Component: Cemented Carbide Color: As pictures shown. Optional Specification: A 8x8mm; B 8x10mm Size: As pictures shown. Quantity: 5pcs Package Includes: 5pcs Countersink Drill Bit note: Please allow 1-3cm error due to manual measurement. please sure you not mind before you bid. Due to difference between different monitors, the picture may not reflect the actual color of the item.