Engineered with a brazed diamonds coated tip and hexagonal shank , these 6mm dry drill bit deliver unmatched durability for precisions drilling in ceramic tiles , marble , granites , and vitrified surfaces without water cooling The spirals cutting structure and anti slip tip ensures 20 % drilling accuracy , while the 1 / 4 " hexagonal shank ensures compatibility with 99 % of power tools for vibrations resistant operations Featuring protective coatings to minimize heat buildup , this 10 piece diamonds drill bit set tackles materials , eliminating tool changes between ceramic , granites , and vitrified applications Ideal for professional contractors , renovation specialists , and DIYer enthusiasts requiring for high precisions tasks in stonework and installations Perfect for creating clean holes in bathroom tiles during remodels , installing kitchen countertops , or executing flooring projects requiring drilling in hard surfaces, Manufacturer: PLCPDM