DU-AGTD High performance diamond angle grinder drills with the ability to drill the hardest of tiles: Porcelain (grade 5) / Ceramic / Quarry tiles / Marble / Terracotta / Glazed tiles / Terrazzo/ Agglomerates / Cement / Glass / Granite.USE ME FOR…FAST DRILLING IN THE HARDEST OF TILES WITH ANGLE GRINDERS• Designed specifically for use with angle grinders. • DU-AGTD drills up to 16mm have integral wax to help aid the cooling of the tile and drill during the cutting process. • DU-AGTD can be used dry or wet to further extend product life