Features 1、70mm Wall Hole Opener: The specification of this wall hole opener is 70mm, which is forged by carbide and quenched at high temperature 2、Sharply Blade Edge: The wall hole saw blade edge is sharply, not easy to break when cutting, provides efficient cutting 3、High Performance: The concrete wall hole opener has high hardness, strong impact resistance and fast drilling speed 4、High Frequency Welding Technology: This wall hole cutter adopts high frequency welding technology, the welding opening is firmly, the inner and outer welding ports are smoothly, and the joint is precise 5、Wide Range of Usage: This wall hole saw is 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 Specification: Approx.70mm/2.8in 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