Ingco 5 Pcs Most Common Masonry Drill Bits

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 granite), please use water for lubricationMaterial: tungsten carbideShank: 3-flats shankUsed for: tile, concrete, brick, glass, plastic and wood,etcHigh quality, durable, pricise drilling in various materials at same time,convinient for use with long life timeOne drill bit replaces two drill bits (1x glass & tile drill bit + 1x Mansonry drill bit), Perfect for drilling fastner holes in bathroom tiles, or wall mirrors. Once it drills through the tile or mirror this drill bit will cope easily with any masonry behind it