Feature: 1. Industrial Grade Material: Crafted from high strength M35 carbide carbide, the eccentric drill bit ensures efficient and stable drilling for deep, angled, blind holes, with exceptional durability and resistance to erosion and deformation. 2. Fast Chip Removal, High Efficiency: Unique eccentric M35 bit design easily penetrates various materials, while the U shaped spiral groove prevents chip accumulation and retention, enhancing drilling efficiency. 3. Wide Application Range: Suitable for multiple materials such as stone, concrete, wood, steel, brick walls, plastic, tiles, and marble, these drill bits are versatile for various construction tasks. 4. Drill Bit Sizes: Includes 4 pieces of 1/4 inch (6, 8, 10, 12 mm) hex shank twist drill bits, offering versatility in usage and providing a secure grip for different drilling applications. 5. Machine Compatibility: Designed for compatibility with electric drills, and bench drills, the high strength eccentric drill bit is convenient to use and ensures high efficiency in a variety of drilling tasks. Specification: Item Type: Eccentric Twist Drill Bit Set Material: Cemented Carbide M35 Size: Approx. 6mm / 0.24in, 8mm / 0.31in, 10mm / 0.39in, 12mm / 0.47in Total Length: Approx. 150mm / 5.91in Hex Shank: 6.35mm (1/4 inch) Compatible with: Hand Drill, Electric Drill, Table Drill Application: for various common ceramic tiles, antique tiles, foam bricks, all kinds of wood. . Package List: 4 x Drill Bit4 x Storage Box Note: There may be size discrepancies.