Features Standard Size: Features standard hole diameter and mounting hole size for easy installation, stable , and high accuracy. Carbide Material: Forged with cemented carbide, quenched at high temperature, providing high hardness and strong impact resistance. High Efficiency: Carbide hole saw with an incisive edge, hard and wear-resistant, ensuring fast drilling speed and durability. Fine Welding: Utilizes high frequency welding technology for a firm welding opening, joint, and smooth internal and external welding without gaps. Wide Application: Ideal for drilling holes in concrete, bricks, wall, and stone, and for cutting and cleaning holes when installing air conditioners, offering versatile usage. Features: 1、STANDARD SIZE: The hollow drill reamer has standard hole diameter and mounting hole size, with easy installation, stable and high accuracy. 2、CARBIDE MATERIAL: The hole saw is forged with cemented carbide, quenched at high temperature, with high hardness and strong impact resistance. 3、HIGH EFFICIENCY: The carbide hole saw has a incisive edge, hard and wear resistant, not easy to break when cutting, and has a fast drilling speed. 4、FINE WELDING: High frequency welding technology, the welding opening is very firm, with joint, smooth internal and external welding without gaps. 5、WIDE APPLICATION: Widely used for drilling holes in concrete, bricks, wall and stone, cutting and cleaning holes when installing air conditioners, etc. Specification: Item Type: Hollow Drill Opener Material: Carbide Color: Silver Specification: Approx. 60mm / 2.4in Uses: Widely used for cutting clean holes in concrete, brick work, drilling wall, stone, installing air conditioners, etc. Package List: 1 x Hollow Drill Opener Package List 1 x Hollow Drill Opener