... steel door hingesControllable toleranceEquipped with the hight-efficiency and high precision advanced vertical & horizontal CNC center, CNC lathe, CNC ... 005mm), knurling, anodizing, Black Oxide, heat treatment, sandblasting etc.Precision processingturning, milling, drilling, grinding, wire-EDM cutting etcApplied softwarePRO/E ... High-quality, well-fame credit ,and good materials torsion spring clip