Designed for drilling in glass and clay tile, The HART 4 piece set features a carbide tip for added durability and longer life of the bit. The 1/4 inch hex shank allows for quick and easy bit changes. Recommended for use with drill/driver. Set includes 1/8-inch, 3/16-inch, ¼-inch and 5/16-inch. Not for use on ceramic tile. Do not use these bits on hammer mode with your drill. HART 4-Piece Hex Shank Glass and Tile Drill Bit Set ------------ Key Features ------------ * Carbide tip provides durability for longer bit life * Recommended for us with drill/driver. * Application Material: Glass & Clay Tile * Shank Style: 1/4" Hex Bit * Material: Carbide Tip * Not for Use on ceramic tile * Do not use bits on hammer mode with drill * Includes: (1) 1/8", (1) 3/16", (1) 1/4", (1) 5/16" * Specs: Size: 1/8", 3/16", 1/4", 5/16"