Features Versatile Drilling: 130mm specification for concrete, bricks, or wall, for installing air conditioners, offering multi-purpose functionality. Carbide Construction: Forged with cemented carbide, ensuring high hardness and strong impact resistance for effective and drilling. Fast Drilling Speed: Carbide head blade with fast drilling speed, providing efficient drilling for quick and hole cutting. Welding Technology: High frequency welding for firm and smooth welding ports, ensuring accurate drilling and cutting. Easy Installation: Standard size for easy connection, offering safe and reliable without the risk of detachment. Features: 1、MAIN PURPOSES: Hollow hole saw specification is 130mm for drilling holes in concrete, bricks or wall, or for cutting holes when installing air conditioner. 2、CEMENTED CARBIDE: Forged with cemented carbide and quenched at high temperature to ensure high hardness, not easy to break when cutting or drilling. 3、GOOD PERFORMANCE: Carbide head blade has the characteristics of high hardness, strong impact resistance and fast drilling speed, effective and . 4、ACCURATE WELDING: Using high frequency welding technology, the welding opening is very firm, and the inner and outer welding ports are smooth and . 5、EASY TO INSTALL: The electric hammer hole opener has standard size, easy to connect and not easy to fall off, which is safe and reliable in . Specification: Item Type: Wall Hole Opener Material: Carbide Color: Silver Specification: Approx. 130mm / 5.1in Uses: Widely used for cutting clean holes in concrete, brick work, drilling wall, stone, installing air conditioners, etc. Package List: 1 x Wall Hole Opener Note: Manual measurement, please allow 1‑2cm error. Package List 1 x Wall Hole Opener