MULTIFUNCTIONAL: The multifunctional door handle lock is designed to prevent children under the age of 5 from opening sliding doors, windows, cabinets and closets without adult supervision. Versatile design and simple: Only 1/4" thick, the safety latch fits right into your home. The 5-Pack Child Safety Lock is designed for use on all finished and unfinished surfaces such as wood, glass and marble. EASY TO INSTALL: The childproof sliding door lock takes less than 2 minutes to install. It requires no tools as it has been pre-applied with 3M adhesive for quick and durable installation. Non-destructive disassembly: disassemble without compromising the aesthetics of the furniture. Heat the childproof lock mounting surface of the door with a hair dryer for a few seconds, then pull the lock.