13-piece drill bit set with 1/4" hex shank for electric tools. Made from speed steel for durability. Diameters range from 1.5 mm to 6.5 mm. Hex grip provides secure engagement and reduces cam-out for cleaner, more accurate holes. Key benefits Easy tool changes: standard 1/4" hex shank fits most drills and impact drivers for quick bit swaps. Reliable durability: speed steel construction stands up to repeated use across common materials. Broad size coverage: 13 sizes from 1.5 mm to 6.5 mm cover typical hole requirements for repair and assembly tasks. Better control and accuracy: hex grip reduces cam-out and improves engagement for straighter holes and cleaner finishes. What’s included 13 pieces (sizes 1.5 mm to 6.5 mm) Applications and use scenarios Woodworking: drill pilot holes for screws when building or repairing cabinets, furniture, and shelving. Metalworking: create small holes in aluminum or thin steel sheets for fasteners or brackets. Plastics and composites: produce clean holes for hardware installation, mounting, or assembly tasks. Usage and compatibility Designed for electric drills and impact drivers with a standard 1/4" hex quick-change or chuck. Use appropriate drill speed and apply lubrication when drilling metal to extend bit life and improve finish. Not intended for masonry drilling. This set delivers a practical range of hole sizes and a robust, hex-shanked design for secure engagement and consistent results across common materials.