Feature: 1. Drill Various Materials: The drill bit is very suitable for drilling concrete, masonry, stone, brick and other construction projects 2. YG8C Tungsten Carbide Tip: Adopt YG8C tungsten carbide tip, can ensure quick and easy drilling and long cutting life 3. Effectively Remove Waste: Masonry drill bit come with double pits, double grooves and round shanks, can effectively remove waste 4. Round Shanks: There are 10 drill diameters, including 4mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 8mm, 10mm, 12mm, 14mm to meet your different needs 5. With Storage Box: Carbide tip drill bit set equipped with a storage box, which is easy to store and convenient for you to carry Specification: Item Type: Masonry Drill Bit Set Material: yg8c+40cr Purpose: Electric hammer drill bit set Drill Total Length: Approx. 160mm / 6.3in Drill Diameter: Approx. 4mm / 0.16in 5mm / 0.2in 5.5mm / 0.22in 6mm / 0.24in 6.5mm / 0.26in 7mm / 0.28in 8mm / 0.31in 10mm / 0.39in 12mm / 0.47in 14mm / 0.55in Usage Scenarios: Bricks, masonry, concrete, rocks, tiles, cement, etc.. Package List: 10 x Masonry Drill Bit1 x Storage Box