Diamond Drill Bits - Hole Saws * 8 Popular Sizes: 3/8" to 1 3/4" - Factory direct products bulk packages. * For porcelain, glass, marble, ceramic, rock and granite * 3/8", 1/2", 3/4", 1", 1 1/4", 1 3/8", 1 1/2", 1 3/4"