Vacuum brazed diamond drill bits for Dry Use on: ceramic, porcelain Granite, marble, glass, quartz Limestone, fibreglass, terracotta Terrazzo, quarry and vitrified tiles

* a high speed drill/grinder must be used;

* working speed: 6000-10000RPM;

* use in dry, start with easy touch will get min. 30% more cutting efficiency & life;

* start with 45oangle on the spot move drill upright when the hole starts;

* designed for high performance and heavy duty use on all tilling materials and other hard stone masonry products;

* guaranteed to make a hole in 5 seconds  on up to 10mm thick porcelain tiles;

* excessive wear will occur on abrasive materials eg. Sand stone, concrete etc
* size from 5-150mm.