You can cut a range of size holes in GLASS, TILES, SLATE, MARBLE ,GRANITE with ease!!! Diamond tiped hole ... saw (Core Bit)You can cut holes in GLASS, TILES, SLATE, MARBLE ,GRANITE with ease,A whole ... range from 15mm to 100mm MAX DILLLING DEPTH 30MMWITH 2 pilot drill bits. one diamond tipped and one tungsten ... of metal packing box as below, Diamond Dust Tipped Glass cutting Hole Saws