Though SP802 is far superior over many other drill bits, its cutting flutes gets blunt after cutting some significant amount of spotwelds. It can be re-sharpened by S2000 Roken Grinder to restore its original shape and performance. This can be repeated as long as the heat treated material on the SP802 is still available. S2000 Roken grinder sharpens with diamond wheel consistently with its correct contour making the same perfect contour on the cutter.