Features: Our drill bit set offer 5 size - 2.8x10mm, 3.0x10mm, 3.2x10mm, 3.5x10mm, and 4x10mm, along with 5pcs replaceable bits and 5pcs wrenches. Crafted from steel, our countersink set boasts exceptional hardness and wear resistance. This durability ensures longevity and minimizes the risk of breakage, allowing for efficient and quick hole drilling with outstanding cutting performances. Our countersink drill bit set offer 2 drilling methods, making it suitable for surface and internal wood drilling, guaranteeing a clean and professional finish. Use a center punch for precise drilling positioning and maintain a vertical angle to prevent bit bending or breakage. Drill through including ceramics, metals, wood, and more. This drill set suitable for various drilling machines, ensuring flexibility in your tasks. Our countersink drill bits are designed with drilling easier for you. Specifications: Component:Stainless Steel+ABS Length:5.9/5.9/6.4/6.9/7.4cm Package Includes: 1 Set Countersink Drill Bit note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.