1. High-Quality Material: The latch is made of ABS and iron. The iron pin core is not easy to oxidize and has strong corrosion resistance. The thickened plastic is environmentally friendly and durable, with strong strength and not easy to break. 2. Spring-Loaded: Built-in strong spring, can be used multiple times without reducing elasticity. Press the red button to open instantly, then press the core to lock. 3. Maximum Fastening Strength: The door closer has a large base, and the four-hole fastening can effectively fix doors and windows, providing you with security and privacy. 4. Usage: These sliding bolt locks are suitable for all types of wooden door frames, such as wooden doors, wooden windows, kitchen cabinets, shoe cabinets, wooden cabinets, and wooden sheds; locks can protect you both inside and out. 5. Installation: Drill and screw installation, the package includes 4 spring-loaded latches, screws included.