Stainless Steel Hidden Door Hinges Invisible Hinge Concealed Folding Door Hinge

304 Stainless Steel. Features: Beautiful installation, no hinges are seen after the door leaf is closed, it is more suitable for outward opening invisible doorexternal opening background wall concealed door, the distance between the door leaf and the door frame is small, and it has the function of preventing hands from being caught!. 1. Suitable for wooden doors, swing doors, aluminum alloy doors, fire doors, of doors, soundof doors, anti-theft doors, etc. Color: Silver. Material: 304 stainless steel zinc alloy. Package Included: 1x Hidden Hinges