Best quality comes out from the best QC process!
1. Raw Materrial: Cr40 Alloy Steel 1)Chemical analysis 2)Steel certificate 3)6: 1 Rolled proportion 4)3: 1 upset forged proportion
2. Machine/equipment Guarantee: Favorable equipments guarantee strict QC process. Smooth/good shape of raw steel is critically important for final products.　
3. Experienced technicians and workers with regular training to keep stable quality.
4. ISO2328 and ISO2330 standard production process and fully heat-treated. Hardness testing HB280-320 . Strict couple making.　

5.3 times static overload testing; 1.5times dynamic overload testing; 1million times of impacting test!
6. Marketing always tells the truth! Over 50 countries dealerships show you the quality confidence!
7. Rigorous QC on the details like painting, flatness, tolerance, parallelism, packing, cleanness.