1. Versatility and Wide Range of OptionsOur 15piece carbide concrete drill bits set includes sizes ranging from 3mm to 10mm, providing a wide range of options to cater to various drilling needs. Whether it's metal, granite, wood, or other materials, these drill bits can handle them all. 2. Round Shank for CompatibilityEquipped with round shanks, these 15 drill bits are compatible with both impacts and hammer drill drivers, offering convenience and versatility in drilling operations. 3. Sharpened Ground Carbide Tips for Extended LifespanThe 15piece large carbide hammer drill bit kit is designed with sharpened ground carbide tips. This ensures faster drilling into masonry materials such as concrete, while also extending the lifespan of the bits. 4. Wide Capacity for Various Materials for drilling into concrete, walls, bricks, wood, glass, tile, stainless steel, and more. For harder materials, it is recommended to use water or coolant during drilling to achieve better results.