"ARTU" MULTI PURPOSE DRILL BIT *For rotary or percussion drilling *For masonry, ceramic tile, concrete, brick, fiberglass, Plexiglas, glass, cast iron, hardened steel, granite, marble & wood *Tungsten carbide & cobalt tip *Chrome vanadium steel shank *Withstands heat up to 1900 deg. F *Resharpen on a high quality grinding wheel *Carded *Discovery ACC, CON, NBR, SUP *7/32"D