【Dry Tile Drill】Dry cast tile drills are brazed and can be easily used without adding water. Internal sealing wax, solid state condensation treatment 【Complete Kit】Including 7pcs dry drill bits, including 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, the most complete size to meet your different needs 【Full Forging】Scientific chip removal design, the hole saw drill body is forged to make the drill more stable without shaking 【Emery quality】Drill bits use electroplated emery. High temperature quenching, high hardness, sharpness and durability, long service life 【Versatile Milling】Versatile diamond milling for granite and marble, masonry, concrete, tiles/ceramics, glass, hard plastic