[Packaging and Guarantee]Receive a comprehensive set of 12 high-speed steel countersink drill bits from YQANDL, a brand renowned for its woodworking and practical tools. This set is designed to meet diverse drilling needs across various scenarios, ensuring a seamless experience with its specialized design.[Unique Spiral Design]Experience precision with our double-edged cutting countersink drill bits that eliminate vibration and ensure smooth surfaces. This design not only achieves faster cutting speeds but also delivers smoother and more precise surfaces than most traditional drill bits.[Newly Upgraded Set]Our advanced set includes 5 countersink drill bits (sizes #4, #6, #8, #10, #12), a 2.36-inch magnetic extension drill bit clamp, 5 replaceable drill bits, an Allen wrench, and a handy storage box, making it a versatile toolkit for any woodworking enthusiast.[Durable and Sturdy]Constructed from titanium-coated high-speed steel for ultimate sharpness and durability. The integrated design of drilling, chamfering, and impact hole creation uses stepped angled blades to maximize durability while minimizing resistance, suitable for a variety of materials.[Multi-Functional Design]Equipped with a 1/4 inch hexagonal shank, this chamfering drill bit kit is compatible with various impact drills, including hand drills, bench drills, and electric drills. It allows for adjustable drilling depths to suit your specific project needs.Color: As ShownMaterial: MetalPackage Contents:12Pcs HSS Adjustable Countersunk Drill Bits set