Features • 70mm Precision Cutting: Designed specifically for clean, precise cuts, this wall hole opener effortlessly drills 70mm holes in various materials without compromising strength • Efficient Sharp Blade: Featuring a specially designed sharp edge, this wall hole cutter minimizes breakage and ensures smooth, efficient cutting for your DIY projects • Durable High Performance: Built with high hardness and strong impact resistance, this concrete wall hole saw delivers fast drilling speeds for exceptional performance on tough surfaces • Advanced Welding Technology: Utilizing high frequency welding, the joints of this hole puncher are securely bonded, providing durability and reliability during heavy-duty applications • Versatile Application Use: Ideal for various tasks, this air conditioner hole opener is perfect for drilling clean holes in concrete, brick, stone, and more, making it a must-have tool for any project 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 hardn, 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 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 Package List 1 x Wall Core Bit