... 2.straight round shank 3.Zinc Plated Zinc plated diamond hole saw for glass ,marble or ceramic Zinc plated Diamond glass & tile ... hole cutter Diameter from 2mm-150mm, Threaded, Straight and round shank, It could be used for glass, tile and ... —150mm ,it is very easy to use , just add water for lubrication.Pictures: Zinc plated diamond hole saw for glass ,marble or ceramic