1、Durable Material: Milling cutter extension rod is forged from excellent carbide, not easily deformed, and can be used for powerful milling to improve efficiency. 2、Convenient Operation: Router collet chuck extension rod with finely ground bore, high concentricity and stability. Smooth thread, high rigidity, strong clamping force, easy to load and unload. 3、Rich Performance: Milling extension rod has a series of excellent properties such as high hardness, wear resistance, better strength and toughness, heat resistance, corrosion resistance, etc. 4、Ingenious Design: The internal cooling extension can bring the milling cutter into the deep hole processing slot for processing, solving the problem of deep hole processing for you. 5、High Adaptability: Widely used in CNC lathes, machining centers, tapping machines, drilling machines, milling machines and other equipment operations.