Concrete and Masonry Drill Bit Set Professional Drill Bit Set (7 Pieces) for Glass/Brick/Plastic/Cement/Wood/Tile/Etc Industrial Strength Carbide Drill Bit Tip

The drill bit is made of alloy material high hardness and wear resistance which can be used for a long time. This drill bit set has 10pcs in 4 different sizes it meets different depths and widths of the hole. It is suitable for most bench drills electric drills and drilling machines with drilling functions. This drill bit has a spiral twist shaft increases stock removal leaves cleanly drilled holes and brings fast drilling dust to remove the 3-flats shank also allows the drill bit easy to plug and to be held tightly. It is suited for brick block stone light concrete ceramic hardwood board glass marble materials etc. Product Specification: Size: 3~12mm Note: When drilling hard material (glass porcelain floor tile marble or granite) please use water for lubrication.