【PARAMETER】- 0.47 inch (12mm) diameter;Material:Alloy steel;Surface treatment:Blackening
【U Groove Drill Bit】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 lubrication
【NOTE】-When drilling hard materials (glass, porcelain floor tile, marble or granite), please use water for lubrication and preserve from over heating; Please do NOT use impact mode of drill or hammers
【Carbide Construction】- With a reinforced head that prevents bit cracking and provides a longer life
【Multipurpose】- Multi-material drill bit set for use with electric or cordless hammer drills; Ideal for drilling holes in concrete, ceramic tile, brick, wood, plastic, soft metal, stone and masonry