... .Free samples to test quality.Raw Materials1)T41:T41 flat cut off wheel2)WA60:Aluminium oxide material grit 60# ... hard metal,like general steels,ferrous metal,aluminium,iron,angle iron,brass,bronze,carbon steel,casting,railway,non-ferrous metal ... tool so that the wheel is at a perpendicular angle to the workpiece being cut;5.Keep a light ... 5" inch resin bonded cut off wheel for angle grinders