Features Carbide Forging: This hole punch is forged with carbide and quenched at high temperature, so the cutting edge is not easy to break when cutting. 75mm Specification: This is a 75mm specification wall hole knife with good stability and durability to ensure long-term use, while the helical design reduces friction and increases drilling speed. High Performance: The concrete wall hole saw has high hardness, strong impact resistance, fast drilling speed, high work efficiency, smooth internal and external welds, precise meshing and beautiful appearance. Welding Technology: High-frequency welding technology is adopted, the welding opening is very firm, and the inner and outer welding joints are smooth, providing precise connection. Wide Range of Applications: This wall hole saw can be widely used to cut clean holes in concrete, brickwork, drilling walls, stone, installing air conditioners, etc. Specification: Item Type: Wall Core Bit Material: Carbide Colour: Silver Specifications: Approx. 75mm/3.0in Usage: Widely used for cutting clean holes in concrete, brick work, drilling wall, stone, installing air conditioner, etc. Package List: 1 x Wall Core Bit Package List 1 x Wall Core Bit