This diamond drill bit by top trusted brand Rubi is the ideal tool choice for drilling holes in seconds with its extreme speed. Great for drilling holes for pipe works when installation bathrooms etc. Suitable to be used with electric drills or angle grinders and with its diamond rim its perfect to use on the hardest of materials such as porcelain, granite, stoneware and other materials. This tile drill bit is manufactured with vacuum brazed technology to increase resistance to any friction and temperature when in use. Available in a variety of diameters.