Specification of York.5x1/8x7/8" A30RBF CUTTING DISC
Grade A30 - For general-purpose use on metals. Grade C24 - For use on stone and non-ferrous materials. Grade R30 - For use on stainless steel. Grade X24 - Special, for use on cast iron. Type 42 Depressed Centre Cutting Discs. Manufactured to assure operator safety and optimum performance. For use with all portable grinders/cut-off machines. Not to be used for 'free hand' cutting and importantly not to be used for grinding.