Feature:1. Drill Various Materials: The drill bit is very suitable for drilling concrete, masonry, stone, brick and other construction projects2. YG8C Tungsten Carbide Tip: Adopt YG8C tungsten carbide tip, can ensure quick and easy drilling and long cutting life3. Effectively Remove Waste: Masonry drill bit come with double pits, double grooves and round shanks, can effectively remove waste4. Round Shanks: There are 10 drill diameters, including 4mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 8mm, 10mm, 12mm, 14mm to meet your different needs5. With Storage Box: Carbide tip drill bit set equipped with a storage box, which is easy to store and convenient for you to carrySpecification:Item Type: Masonry Drill Bit SetMaterial: yg8c+40crPurpose: Electric hammer drill bit setDrill Total Length: Approx. 160mm / 6.3inDrill Diameter: Approx. 4mm / 0.16in5mm / 0.2in5.5mm / 0.22in6mm / 0.24in6.5mm / 0.26in7mm / 0.28in8mm / 0.31in10mm / 0.39in12mm / 0.47in14mm / 0.55inUsage Scenarios: Bricks, masonry, concrete, rocks, tiles, cement, etc..Package List:10 x Masonry Drill Bit1 x Storage Box