ZINCOO Diamond Coated Hole Saw Drill Bit Set - Carbon Steel & Diamond - For Glass, Tile, Porcelain, Ceramic, Stone, Brick, Fiberglass, Vitrified - 37mm

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