These Grit 60, 8 inch (200 mm wide, 750 mm long) zirconia - extra strong / durable sanding belts are ideal for aggressive and timesaving yet smooth sanding. Belts are used in most modern sanding machines. The sanding belts are held together by a thin yet extremly strong kevlar tape in an either straight or finger type of joint. The choice of grit quality and backing is guided by the sanding requirements.