[2 Pieces] Hidden 90 Degree Hinge Carbon Steel Sliding 3 x 3x 1 inch, Gray
The hinge is small and has a 90-degree support force, which can occupy a large space. Features: made of sturdy steel, can withstand heavy loads, ideal for internal wooden doors / wooden doors. To ensure that the door remains closed in the event of a fire certification, it is suitable for smoke exhaust door components.