Coronas Dry drill bits • HOLEGRES

Great performance and efficiency thanks to the Vacuum Brazed technology for welding the diamond to the crown.

Perfect holes in porcelanic tiles up to 20 mm thick and in many other materials such as klinker, tiles, granites and marbles, slate, glazed cast-iron tub, composite materials of polyester, fiberglass and similars.

Use with a minimum 500W drill or grinder.

It is recommended for prolonging the life of the diamond drill bits, moisten.

Make a moderate pressure so that the drill bit makes the cut, an excessive pressure will overheat the diamond and lose the durability.

It is recommended, for the prolongation of the useful life of the diamond drill bit, a good refrigeration by turning in a vacuum or wetting the diamond zone every 45-60 seconds.

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