Features: Versatile Hex Shank Design: Our drill set features a hexagonal shank, making it compatible with a wide range of electric drills and impact drills. Whether you're working with iron sheets or thin planks, these drills are perfect for the job. Exceptional Durability and Sharpness: Crafted from heavy-duty alloy, our twist drills are built to last. With outstanding durability and sharpness, they effortlessly penetrate various materials, ensuring precise and efficient drilling every time. Hex Shank Screw Spiral Point: Equipped with a hex shank screw spiral point, our drill bits provide optimal stability and control during drilling. This feature enables smooth and accurate drilling, reducing the risk of slipping or wobbling. Integrated Composite Tap Drill Bit: Our drill set includes an integrated composite tap drill bit, offering the convenience of two functions in one. This versatile tool allows you to effortlessly drill and tap holes, saving you time and effort. Perfect for Deburring and Chamfering: In addition to drilling, our drill set excels at deburring and chamfering. The sharp and precise cutting edges remove burrs and create smooth chamfered edges, enhancing the overall finish of your workpiece. Specification: Material: Alloy Size: 12*124*6.3mm, 10*122*6.3mm, 8*113*6.3mm, 6*98*6.3mm, 5*90*6.3mm, 4*89*6.3mm, 3*89*6.3mm Notes: Please allow slight tolerances in size due to manual measurement, and lighting in photography may result in a difference in color than in real. Include: 7pcs*Hexagonal Shank Spiral Drills