| High Quality MaterialCarbide tipped alloy head material with stronger hardness. Carbide drill bits are built to last and stay sharp much longer than traditional steel drill bits. U-Type Slotted- Design U-type slot design with fast drilling dust removal, triangular handle design, stable operation. Wide range of applications The top Strong tungsten carbide tip design can easily penetrate various materials (porcelain ceramic tile, glass, mirror, plastic masonry and wood). When using the drill bits to drill concrete, brick wall and other hard materials (glass, porcelain floor tile, marble or granite), please use water for lubrication. 7 sizes: 6mm, 6mm, 6mm, 6mm, 8mm, 10mm, 12mm. 3 flat shank, these … | |