The item is used extensively from removing bead after welding to building work, bridge construction work, shipbuilding and auto manufacturer.
HCA: For sanding iron plate surfaces of hulls, structures, car bodies, etc., grinding of weld beads and descaling. For removing casting burrs, die-casts, etc. A hard type, Optimum for sanding stone materials, marbles, concrete, etc.
FCA: For sanding thin steel plated surfaces, for rough sanding of non-ferrous metals and for finish sanding.