One drill bit replaces two drill (1x glass & tile drill bit + 1x Mansonry drill bit), Perfect for drilling holes in bathroom tiles, or wall . Once it drills through the tile or mirror this drill bit will cope easily with any masonry behind it 5 Pcs drill bit set with 4 different sizes: 2x 6mm(1/4inch), 1x 8mm(5/16inch), 1x 10mm(3/8inch), 1x 12mm(1/2inch) U type slot design with fast drilling dust remove, 3-flats allows drill bit to be tightly and stably in power drill. When drilling hard material (glass, porcelain floor tile, marble or granite), please use water for lubrication Material: tungsten carbide : 3-flats Color: Black & Silver Used for: tile, concrete, brick, glass, plastic and wood,etc High , durable, pricise drilling in various materials at same time,convinient for use with time Tool: Power drill. Do not use impact mode of drill or hammers Package Contents: 2x 6mm(1/4inch) Drill Bit 1x 8mm(5/16inch) Drill Bit 1x 10mm(3/8inch) Drill Bit 1x 12mm(1/2inch) Drill Bit Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.