Pointed design strong tungsten carbide tip can easily penetrate various material(tile, concrete, brick wall, glass, mirrors, plastic masonry and wood)When drilling hard material (glass, porcelain floor tile, marble or granite), please use water for lubricationU type slot design with fast drilling dust remove, Triangular handle design, operation more stablecolour:Black + silverMaterial:Tungsten carbidesize:3mm 4mm 5mm 6mm 8mm 10mm 12mmPackage Contents:7*Tungsten Carbide Drill BitOnly 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.