5 Piece, Multi Purpose Drill Bit Set, Consists Of One Each 1/8", 3/16", 1/4", 5/16" & 3/8", For Rotary Or Percussion Drilling, Cobalt & Tungsten Carbide Tip For Maximum Hardness & Resistance To Heat & Wear, For Use With Masonry, Concrete, Brick, Marble, Granite, Hardened Steel, Cast Metal, Fiberglass, Plexiglas, Ceramic Tile, Hard Wood, Soft Wood & Glass, Plastic Case.
