United abrasives – sait 22082 depressed center wheel t27 6″x .045″ x 7/8″ ceramic alum. Oxide type 1 thin high speed cut-off wheel, ceramic aluminum oxide grain. High performance, very uniform, high density grain structure is extremely durable and self sharpening for long life and cooler cut. Fast cutting with extremely long life. Externally reinforced with fiberglass layers to provide ultimate safety in a thin wheel.