1/4" x 4-1/8", Multi Purpose Drill Bit, Cobalt & Tungsten Carbide Tip For Maximum Hardness & Resistance To Heat & Wear, For Rotary Or Percussion Drilling, For Use With Masonry, Concrete, Brick, Marble, Granite, Hardened Steel, Cast Metal, Fiberglass, Plexiglas, Ceramic Tile, Hard Wood, Soft Wood & Glass, Carded.
