General description This set of diamond drill bits is designed for high-performance drilling in hard materials such as glass, ceramic tiles, granite, marble, limestone, quartz, and terrazzo. It includes five bits with diameters of 5 mm, 6 mm, 8 mm, 10 mm, and 12 mm, catering to various drilling needs. Technical specifications Material: High-quality emery, galvanized Bit diameters: 5 mm, 6 mm, 8 mm, 10 mm, 12 mm Design: Scientific chip removal design for stability Coating: Diamond coating for increased drilling speed Compatibility and accessories Compatible with most machines including handheld drills, angle grinders, and bench drills Usage Ideal for drilling through hard materials Side grooves help remove debris for smooth and quick drilling Depth markers assist in achieving precise drilling results