... Zinc plated Diamond glass hole saw for tile,marble,slate 1.Size:2-150mm ... plated Diamond glass hole saw for tile,marble,slate Zinc plated Diamond glass & tile hole cutter Diameter from 2mm ... Straight and round shank, It could be used for glass, tile and stone drilling, The normal total length ... easy to use , just add water for lubrication.Pictures: Zinc Plated Diamond glass hole saw for tile,marble,slate