1. It is forged with high-quality 40CRMuTi steel, quenched and hardened, and is not easy to deform. It can be used for powerful milling to improve efficiency.. 2. The inner hole is finely ground, with high concentricity and strong stability. The thread is smooth, the rigidity is high, the clamping force is strong, and the loading and unloading is convenient.. 3. The ER extension rod can bring the milling cutter into the deep hole processing slot for processing, which can solve the difficult problem of deep hole processing for you. 4. It is widely used in CNC lathes, machining centers, tapping machines, drilling machines, milling machines and other equipment operations. Package included: 1pc CNC ER Extension Rod.
