Features: Contains four different sizes (3mm, 4mm, 5mm, 6mm), suitable for various hard surfaces projects such as concrete and bricks. The hexagonal handle provide a stable grip and minimizes slipping during operation, ensuring precise drilling every time. These drill bits are crafted from metal, durable, and can handle high demand tasks without wear or damage. Specially designed for spirals wall applications, these drill bits facilitate efficient drilling without compromising material integrity. Very suitable for professionals and DIY enthusiasts who need reliable tool in construction or decoration projects. Specifications: Material: Metal Product model: 3mm/4mm/5mm/6mm Package Includes: 4Pcs Drill Bit note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.