High Versatility : With a range of sizes from M3 to M10, this Metric Thread Screw Tapping Tool caters to various applications, making it an indispensable addition to any professional toolkit. Quick Change & Efficiency : The ¼-inch (6.35mm) hex shank allows for rapid tool changes, saving time and effort during multitasking projects. Prevent Over-drilling : Designed with a back taper exceeding the tap, this set prevents over-drilling and safeguards against thread damage, ensuring precise work every time. Three in One Operation : Combining drilling, tapping, and countersinking functions, this tool streamlines your workflow and enhances productivity. Nitriding Surface Treatment : Featuring a hardened and corrosion-resistant surface, these bits maintain their sharpness and efficiency across multiple uses. Upgrade your workshop with our Professional Metric Thread Screw Tapping Tool, meticulously crafted for efficiency and precision. Designed to meet the demands of professionals, it effortlessly drills, taps, and countersinks in one step, revolutionizing your workflow.