180x6x22.23mm A30TBF DPCGRINDING DISC Kennedy Depressed Centre and Flat Reinforced Grinding Discs All Kennedy Depressed Centre and Flat Reinforced Cutting wheels now carry the "oSa" (The Organisation for the Safety of Abrasives) mark of approval. "oSa" is an association of the world's leading abrasives manufacturers. In France, it is mandatory to use only oSa-certified rough grinding wheels and cutting wheels. Similarly in Germany and Italy, it is strongly recommended that abrasive products conform to the relevant EN standards. "oSa" marked products are guaranteed to meet or exceed the highest worldwide safety standards, including those of the Comite Europeen de Normalisation (CEN), the European standards body that issues EN standards, and of ANSI in the USA