The Mercer Industries blue Lightning diamond blades for glass tile are available in 4-1/2", 7" and 10". the blades have a high diamond concentration which allows the blade to last longer and increase efficiency. It is tensioned and balanced so No wobble when using the blade. Features a steel core with proprietary diamond BOND. Tile diamond blades are designed to cut cleanly and accurately. Diamond blades last up to 100x longer than standard abrasive blades.