This comprehensive drill bit set is a must-have for any DIY enthusiast or professional woodworker. Crafted from high-speed steel, these 25 pieces are designed to tackle a wide range of materials, including wood, resin, Jin Gang, linden, horn, amber, olive, walnut, and plastic. With sizes ranging from 5/32 inch (4 mm) to 1/16 inch (1.6 mm), you'll have the perfect bit for every job. Whether you're drilling precise holes for dowels or creating intricate designs, this set has you covered. However, it's important to note that these bits are not suitable for harder materials like steel, iron, or stone. With proper care and use, these drill bits will become a reliable addition to your toolkit, ensuring precise and efficient drilling for all your woodworking projects.