Specifications: Product Name: Drill Bit Shank type:Hex shank Optional Size:6mm/0.24inch 8mm/0.31inch 10mm/0.39inch 12mm/0.47inch 14mm/0.55inch Description Versatile Drilling Applications: This drill bit is specifically designed for use on various materials including granite, marble, and concrete, making it an essential tool for a wide range of drilling tasks. Dry Drilling Technology: Featuring an innovative wax core for cooling, this drill bit allows for efficient dry drilling without the need for water, enhancing convenience and portability during use. Enhanced Durability: Constructed with brazed technology, this bit ensures a longer lifespan, allowing for repeated use while maintaining performance High Efficiency Performance: Engineered for quick and effective drilling, this bit significantly reduces the time spent on projects, making it for both professionals and DIY enthusiasts. Hexagonal Shank Design: The hexagonal shank provides a secure grip in drill chucks Package Content: 1*Drill Bit