We are offering coated abrasive cup wheel. Re vertically or horizontally on a circular fiber plate and strongly bonded with adhesives in between them. Used by portable sanding tool. safety guide: do not start grinding before the machine runs at max. Rpm do not force the flap disccup wheel with the side into the grinding zone or into sharp contours or welds, to avoid catching or jamming of the flaps avoid plunge grinding, cutting or wet grinding with flap disccup wheel do not put machine down when the flap disccup wheel is still rotating.