【Material】 The automatic door lock is made of high-quality aluminum alloy, which is rust-resistant. The surface is painted or anodized, making it corrosion-resistant and durable. 【Package Information】 There are 4 door latches in the package, 2 of them are black and 2 are silver. You can use the door lock in the appropriate color depending on the door or environment. 【Spring Design】The inside of the window lock is designed with a spring structure. If there is no external force, the door will not open. When you want to open the door, gently pull on the locking ring. 【Easy to Install】The spring bounce lock is easy to install; we come with 16 screws. Simply align the screws with the door and door frame, and screw the provided screws into the wood to secure it. 【Wide Application】The aluminum door lock is suitable for securing small doors, windows, patio doors, office drawers, cabinets, toolboxes, lockers, kitchen cabinets, etc. Product Description: 1. The automatic door lock has a refined