... Zinc plated Diameter 5mm-150mm diamond glass hole saw Zinc plated Diamond glass & tile hole cutter Diameter from 2mm-150mm, Threaded, Straight ... and 95mm, Diamond Core Drill Bits, also know as Diamond Hole Saws, are used to drill glass,ceramics, porcelain, ceramic and ... porcelain tile, limestone, slate, marble, granite, stone, and fiberglass hole drilling . Size is from 2mm—150mm ,it is very easy ...