The shaft core is made of Japanese nickel chromium molybdenum steel material (SNCM21); The shaft sleeve is made of chromium molybdenum steel material (SCM4); Has high torque, high toughness, high speed, high wear resistance, high precision, and high stability; Built in hydraulic knife, floating reverse buckle device, ultra precision P4 grade bearing‍‍Our company keeps up with the pace of the times, puts people first, is market-oriented, strives for progress, innovates production, and insists that customer development is our goal. We listen to your voice at any time and wholeheartedly provide you with the best quality products‍‍‍‍Product.‍‍‍