The Norton Vulcan R842 flap disc is a versatile product and works on various material types from stainless steel, cast iron to carbon and black steels.  Norton Vulcan R842 is ideal for metal fabricators who are looking for a flexible product which can tackle rough grinding and bevelling to deburring and semi finishing with ease.  The flap disc contains an exclusive Norton zirconia grain that self sharpens during use to expose new cutting faces and thereby extending product life.