The Do it Best 6-Piece Glass & Tile Bit Set is designed with a carbide tip and an exact point start to minimize bit walking, ensuring precision when drilling through glass and ceramic tile. This set delivers smooth, accurate performance for delicate materials. This 6-Piece set includes (1) of each: 1/8", 3/16", 1/4", 5/16", 3/8", and 1/2".