The multi sharp att2001 dual purpose sharpener will accurately sharpen hss and masonry bits including 2 and 4 edged bits and sds plus bits and brad centre point bits the grinding jig accurately positions each type of bit over the wheels aluminium oxide and silicon carbide and grinds the correct tip and relief angles can be powered by any electric drill it also re edges and re sharpens scribers bradawls punches cold chisels and tct tile and laminate cutters fits any power drill drill bit capacit