High-quality materials: This drill bit set is made of high-quality emery material, electroplated, wear-resistant, durable and has a long service life. High hardness and sharpness. Scientific design: The diamond drill uses scientific chip removal design to make the diamond drill group more stable, and the diamond tile shank has a circular design, which is widely used in electric hand drills and grinders. Unique detail: Diamond coating increases drilling speed. The round shank is compatible with most machines such as hand drills, angle grinders, bench drills, etc. Side grooves help remove dirt and drill holes smoothly and quickly. Depth markings are useful for precise projects. Wide range of applications: The tile drill bit set is very suitable for drilling hard materials such as glass, ceramic tile, granite, marble, limestone, quartz, terrazzo, etc. Our diamond drill bits for tiles have several diamond segments that act as cutting teeth and thus enable particularly precise and fast