Features: Experience superior durability and accuracy with this countersink drill bit set, extending lifespans 5 times for unflawed screw fits in woodworking applications. Crafted from high speed steel with helical drill bits and a magnetic extended bit holder, the set delivers efficient cutting and secure storage in the included box. Ideal for craft enthusiasts, professional carpenters, and construction workers seeking efficient and versatile drilling tools. Perfect for furniture assembly, home renovations, and urgent repairs in various materials like wood and metal. The ergonomic hexagonal handle provides a nonslip grip, ensuring safe operations even in tight or elevated workspaces. Specifications: Materials: High Speed Steel Size: 12#: 6.92x0.635cm, 10#: 6.56x0.635cm, 8#: 6x0.635cm, 6#: 5.65x0.635cm, 4#: 5.05x0.635cm Package Includes: 1Set High Speed Steel Countersink Drill Bits note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!