Ahlsen - Efficient Universal Drilling Tool, 5-Piece Cross Hex Tile Drill Bit Set Concrete Drill Bit Set for Glass, Plastic, Tile (Silver)

5pcs/set Efficient Universal Drilling Tool, 3-7mm Triangle Drill Bit, Multifunctional Cross Alloy Drill Tip High Performance Utility Tools for Woodworking Application: Cement wall, concrete, tile, wood, metal, stainless steel, aluminum alloy, wood, bubble brick, etc. Materials: Cemented Carbide Product Size: 3*70/4*70/5*76/6*77/7*78mm 【Various sizes】3mm, 4mm, 5mm, 6mm, 7mm, suitable for your different needs. It can be installed in the general electric hand drill, bench drill. The drill attachment range is 10mm and above. 【Unique Cross Angle Design】 Low cutting resistance, stable drilling, fast speed, without breaking the boundary. Neat opening, smooth, no broken edges, no tremor phenomenon, easy chipping. 【Fine Workmanship】 Full processing and rust-proof. The drill bit is more wear-resistant and durable. Fully Automated Polishing: CNC polished is fully automated, each one is unified. 【High-Quality Materials】 It is made of high-quality YG6X alloy as raw material. The oxynitriding