【Dry Cast Tile Drill Bits】Dry cast tile drill bits are brazed and can be used smoothly without adding water. Internal sealing wax, solid state condensation treatment 【Complete Kit】Includes 7 dry drill bits, including 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, the largest size complete to meet your different needs< /p> 【Whole Forging】Scientific chip removal design, the body of the hole saw drill bit is forged to make the drill more stable without shaking 【Emery Quality】The drill bits use electroplated emery. High temperature quenching, high hardness, sharpness and durability, long service life 【Multi-purpose cutters】Multi-purpose diamond cutters for granite and marble, masonry, concrete, tiles/ceramics, glass, hard plastic