describe Drill bits for drilling tiles and ceramic tiles, ideal for drilling fixing holes in bathroom tiles or mirrors. Drill glass or tile and the material behind it. The tough tungsten carbide tip easily penetrates a variety of materials (tile, concrete, brick, glass, plastic, wood, etc.) and reduces the risk of breakage. 5 drill bits in 4 different sizes: 2 x 6mm (1 or 4"), 1 x 8mm (5 or 16"), 1 x 10mm (3 or 8"), 1 x 12mm (1 or 2 inches) ). The drill bit is designed for fast drilling, has a good dust removal effect, and the drill bit has flats to hold the drill bit firmly in the drill. Lubricate with water when drilling in glass, porcelain, marble tile or granite. Features: Set Contents: 5 Drill Bits, 2 x 6mm (1 or 4"), 1 x 8mm (5 or 16"), 1 x 10mm (3 or 8"), 1 x 12mm (1 or 2") Material: Tungsten carbide tip. Stem: 3 units. Color: Black or Silver. Packaging: transparent plastic box. These bits can be used to drill tile, concrete, brick, glass, plastic, wood and more. Features: High quality, durable, precise drilling in different materials at the same time, long service life. manual : Tools: electric drill. Do not use in impact mode or with a hammer. Lubricate with water when drilling in glass, porcelain, marble tile or granite.