1、CEMENTED CARBIDE: The core bit is forged from cemented carbide, quenched at high temperature, and has a incisive edge, which is not easy to break when cutting, and is incisive and durable. 2、FAST DRILLING SPEED: Due to the high hardness of carbide inserts, it has strong impact resistance and fast drilling speed. 3、ACCURACY WELDING: The cutter head adopts high frequency welding technology, the welding opening is very firm, and the inner and outer welding ports are smooth. 4、DURABLE: Our products have been tested to show that they are not easy to break after repeated high frequency use, and can be used for a long time. 5、MAIN APPLICATION: This core bit is widely used for cutting clean holes in concrete, brick work, drilling stones, installing air conditioners, etc.