Diamond Drill Bit Round Shank Hole Saw Drill Bits Tools Hollow Core Drill Bit Hole Saw Masonry Tools For Ceramic, Glass, Porcelain Tile Hollow Core Drill Bit Cutter With Diamond Coating ( Size : 145mm

High Quality Diamond Drill Bit Set With Rustless, Cuts Quickly:Made from high strength carbon steel with nickel plating surface makes these drill bits durable and precise; Faster, Sharp and Smooth Cut:Tip Head of Diamond Hole Saw coated with High quality Diamond to enhance fast and precision cutting for a sharp, high precision and smooth cut with no broken edges In Seconds. Multipurpose:Our Diamond Drill Bit is suitable for drilling glass, tile bottles, blocks jars, fiber glass porcelain tile ceramic, vitrified, brick and stone.(especially for glass and tile) Nice Design:The center pilot holes and side holes help to remove the waste material easily;And surface nickel plating, extend the service life, enhance the surface corrosion resistance Kind Notification:When cutting hard materials it is important to ensure the cutter is kept cool to avoid damage to the material being drilled and premature wear of the cutter; Water is required for lubrication when drilling, which can extend the life of the drill bit set