A set of core bits of tile with the size of 33-83 mm TM SD-0428 is designed for drilling large holes. Hex shank drill made of steel with a tungsten coating, equipped with a pilot drill. Includes 5 drill bits of different diameters, as well as files. All instruments are equipped with a special bag. The allowable number 800-1500 revolutions / min. Scope: brick, fiberglass, glass, ceramics, porcelain, glass. Features wide range of applications, tungsten spraying, the drill guide.