Durable Construction: These black and gold twist drill bits are made of high-speed steel for long-lasting durability and precision drilling through metal and wood. Versatile Sizing: The set includes 6 drill bits with a shank size of 25/64 inch , suitable for various drilling applications. Efficient Design: The twist design allows for efficient chip removal and smooth drilling operation. Wide Application: Ideal for drilling holes in metal, wood, plastic, and other materials in various DIY projects or professional settings. Convenient Set: The 6-piece set provides multiple size options, ensuring you have the right drill bit for your needs. Tackle your toughest drilling tasks with confidence using these OXTUL 6-piece 25/64" black and gold twist drill bits. Crafted from high-speed steel, these durable drill bits are designed to effortlessly bore through metal, wood, and other tough materials. The black oxide coating enhances heat resistance and extends the lifespan of the bits, while the gold titanium nitride coating promotes smoother cuts and reduced friction. With their sturdy shanks, these drill bits provide a secure fit in your drill chuck, ensuring precise and controlled drilling. Whether you're a professional contractor or a DIY enthusiast, this set of twist drill bits is an essential addition to your toolkit for tackling a wide range of drilling applications with ease.