Features: The 15piece set includes woodworking countersunk drill, hexagonal wrench, bit stopper, claws cork drill and straight shank twist drill, and various specifications of woodworking bits to meet different needs. All purpose 6.35mm shank diameter, wide application, stable clamping and not easy to slip; Suitable for all kinds of wood and wood products. Elevates your woodworking projects with our drill and countersink wood set, featuring carbon steel construction for long lasting durability and precisions. For woodworking enthusiasts, and professional carpenters looking to achieve flawlessly result in their woodwork creations. Whether you're working on home renovations, furniture making, or custom woodworking tasks, this versatiled tool kit is essential for a wide range of applications. Specifications: Component:Carbon Steel Twist Drill:Approx.1.98/2.38/2.78/3.175/3.56mm(0.07/0.09/0.1/0.125/0.14inch) Package Includes: 15pcs/set Woodworking Drill Bit note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.