Lock & Key and Hinge

Mechanical key lock is a device used to protect a door or space where the construction and use of the mechanism relies solely on non-electronic components. Refrigerator middle hinge is used to hold refrigerator door. Mechanical key lock is a device used to lock a door. This is the classic lock which is opened and closed mechanically using a key. When the key is turned one direction in the keyhole, it engages the deadbolts on the door, locking it; in the other direction, it opens the door.