Drill Bit Set, Efficient Universal Drill Tools Multifunctional Triangle Drill Bit Set, Hard Triangular Cross Alloy Drill Bit Set for Glass, Plastic, Tile, Wood, Concrete, Drill Tip Tools (6 Pieces)

【6 Different Sizes Available】Brick drill bits, including 4mm/0.15", 5mm/0.19", 6mm/0.23", 8mm/0.31", 10mm/0.39", 12mm/0.47", suitable for your different needs. It can be installed on general electric hand drills, bench drills and machine drills., 【High Quality Material】 The drill set is made of high quality alloy as raw material. The oxynitriding treatment of the cutter head enhances the drill hardness., 【Unique Cross Design】Using carbide tip drills, with low incision resistance, stable drilling, fast speed, and no edge breakage. The opening is neat, smooth, without broken edges, without vibration, and easily broken., 【Surface Electrophoresis Paint Process】The drill bit set is fully polished and rust-proof, clean, sharp and free of burrs. The drill bit is more wear-resistant and durable, fully automatic polishing, and each one is uniform., 【Wide Range of Use】Professional glass and tile drill bit drilling tool provides smooth and accurate drilling on tiles, marble, sheet iron, mirrors and glass.