Features: This drill bits set features premium alloy tipped masonry drill bits with 5-16mm diameter options, delivering durability and versatility for demanding concrete drilling tasks. Packaged in a plastic case, the multi diameter alloy drill bit set ensures organized storage and portability while maintaining sharpness for repeated use on tough surfaces like stone and reinforced concrete. Ideal for professional contractors, construction workers, and enthusiasts requiring rotary hammer drill accessories for heavy duty masonry projects. Perfect for drilling anchors hole in concrete wall, installing electrical conduits in brick surfaces, or creating ventilation openings in stone structures at job site and home renovations. The round shank design ensures secure compatibility, minimizing slippage during high impacts drilling while optimizing power transfer for faster, cleaner boreholes. Specifications: Component:Alloy Length 16cm/6.3'' Diameter Type:5-16mm,5-12mm Quantity:6,7,9 Package Includes: 1Set 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.