One drill bit replaces two drill bits (1x glass & tile drill bit + 1x Mansonry drill bit), Perfect for drilling holes in bathroom tiles, or wall mirrors. Once it drills through the tile or mirror this drill bit 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 shank allows drill bit to be held tightly and stably in power drill. When drilling hard material (glass, porcelain floor tile, marble or ), please use water for lubrication Material: tungsten carbide Shank: 3-flats shank Color: Black & Silver Used for: tile, concrete, brick, glass, plastic and wood,etc , , pricise drilling in 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 products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.