Features： 1、Carbide Forged: This hole puncher is exquisite forged by carbide and quenched at high temperature, the edge is not easy to break when cutting. 2、75mm Specification: This is a 75mm specification wall hole cutter, which has good stability and durability, ensuring long term usage. 3、High Performance: The concrete wall hole opener features high hardness, strong impact resistance and fast drilling speed, provides high working efficiency. 4、Welding Technology: Adopt high frequency welding technology, the welding opening is very strong, the inner and outer welding ports are smoothly, provides precise connection. 5、Wide Range of Application: This wall hole saw can be widely used for cutting clean holes in concrete, brick work, drilling wall, stone, installing air conditioner, 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