General description The IRWIN Cordless Multi-Purpose Drill Bit Set is designed for versatile drilling into a wide range of materials, including wood, brick, ceramic tiles, drywall, limestone, slate, marble, and plastics. This 5-piece set includes drill bits in sizes 4mm, 5mm, 6mm, 8mm, and 10mm, making it ideal for various home improvement tasks. Technical specifications Set includes 5 drill bits: 4mm, 5mm, 6mm, 8mm, and 10mm Four-facet ground carbide tip for lower drilling pressure and better centering Designed for rotary drilling, not suitable for hammer action Maximum drilling hardness grade: 9 for ceramic tiles Single flute design for efficient dust removal Up to 15% faster drilling speed and 10% more holes per battery charge than competitors Made with a chrome vanadium body with high carbon content for enhanced durability Compatibility and accessories Compatible with cordless drills that support standard drill bits Suitable for drilling into brick, ceramic tiles, drywall, wood,