Multipurpose Drill Bit
Up to 3 to 4 times stronger than the typical single purpose bit. Cuts through masonry, ceramic tile, concrete, fiberglass, plexiglass, glass, cast-iron, hardened steel, granite, marble, and wood. Negative back grinding enables tip to bore through materials with a filling action. Designed for rotary or percussion drilling. Cobalt and tungsten carbide drill bit tip designed for maximum hardness and resistance to heat (up to 1900 deg. F.) and wear. Chrome vanadium steel shank. Carded.