UNIQUE DESIGN: The chip removal holes are uniquely designed on both sides of the drill bit. During use, you don't have to worry about sawdust blocking the drill bit and blocking the drill bit. It will make your drilling work smooth until the end and improve efficiency. MULTIPLE SPECIFICATIONS: Different sizes of wood require different types of drill bits. The hinge drill bit set includes 7 different sizes of drill bits to meet your different specifications and sizes. Our products are high-quality drill bits that are precisely positioned and do not shift. HIGH-QUALITY MATERIAL: The hinge drill is made of high-quality materials, with high hardness and durability , which is very suitable for long-term use. WIDE RANGE OF USES: Simple structure, easy to use and install, high-precision drills are used to drill holes of precise guidance in cabinet door hinges, handles, woodworking, etc., suitable for professionals and family DIY. TIPS: When opening holes , please adjust appropriately according to the hardness of the wood. If the wood is soft, you can choose the smaller one, if the wood is hard, you can choose the corresponding one or the larger one.