... (1) Item name: Heavy-duty Ball Bearing Hinges with Zinc Plated (2) Material: Steel(3) Size: ... aluminum, brass, etc 2. Stamping, punching, bending, welding, threading, grinding, milling, machining, lathe, assembling etc. 3. Finishing: Anodizing, ... . Our leading products: welding component parts, metal stamping parts, punching parts, hardware for furniture, bracket parts, design and made of Moulds, ...