Weiler Wolverine premium aluminum oxide 4 inch resin fiber discs provide an even, sharp, clean cut rate and consistent performance at a great value for everyday, general purpose use on steel. Ideal for industries such as ship building, tank & pressure vessel, ornamental fabrication and right angle grinder applications such as edge chamfering, weld blending, surface preparation and finishing. Ideal for Blending, Finishing and Surface Preperation. For use on right angle grinders. Even, clean cut-rate. Consistent Performance. Excellent Value.