9 PCS Countersink Drill Bit Set, 1/4 Inch Hex Shank Counter Sink Bits

【Three Size Set】A 9-piece countersunk drill bit set, equipped with the three most commonly used specifications of 12mm, 16mm, and 19mm, which can easily handle various countersunk operations from fine cabinet screws to large structural wood screws. With one set in hand, no matter whether you are DIYing small pieces or large furniture projects, you can achieve a perfect flush or lower screw head with the surface of the workpiece, preventing wood cracking and presenting a seamless professional finish. 【High-Quality Material】The countersunk drill bit set is made of high-quality high-speed steel (HSS) and strengthened by heat treatment, so that the cutting edge remains sharp despite repeated use. The excellent heat resistance performance significantly resists the high temperature generated by drilling, greatly reduces wear and ensures stability and reliability under long-term use. It is a durable and powerful tool in your tool box. 【Precision Five-Blade 90° Chamfer Design】The countersunk drill bit set has a unique 5-blade inclined cutting edge, which is optimized for 90° tapered countersinking. The cutting process is smooth and smooth, significantly reducing vibration and jitter. With the self-centering angle, it is easy to cut smooth and precise holes in wood, plywood, MDF and plastic, effectively avoiding chipped edges and burrs. 【1/4-Inch Hex Quick-Change Shank】The countersunk drill bit set adopts a universal 6.35mm hex shank design and is suitable for all standard drill chucks, including quick-release electric drills, impact drivers, and bench drills. The anti-slip grip ensures firm installation, effectively eliminates drill bit swing, enables quick replacement and efficient drilling, and completely bids farewell to the cumbersome operation of traditional key chucks. 【Widely Applicable Materials】The countersunk drill bit set is widely used in wood, particleboard, fiberboard, plywood, PVC and plastic products, and can also process soft metals such as aluminum and brass. Whether it is furniture manufacturing, cabinet installation, or home renovation and repair, it can be used with ease. It is a rare all-round auxiliary tool for professional craftsmen and DIY enthusiasts.