• Design: Each hinge features a 5-knuckle barrel with flat metal leaves folded together for compact bulk packaging (6 hinges visible in this box).
• Material: Unfinished or natural mild/carbon steel (often welded onto metal frames/gates or screwed into wood if pre-drilled—similar to the pre-drilled hinges visible in the box in the background).
• Common Uses: Heavy-duty doors, metal security gates, toolboxes, cabinets, and window frames.