Mounting plates for welding for self-closing gate hinges—made of iron, for permanent welding to posts and round tubes. Round (Ø 65 mm) and square (70 × 120 mm, also for round tubing with an outside diameter of 4–5 inches). Compatible with the weld-on hinges SM-W, 57-W, 57SF-W, 108-W, and 108SF-W. Note: Protect the plate against corrosion after welding.