Home safety: Child Window Safety prevents accidents caused by children opening windows or refrigerators too much Easy to install and use: the child safety lock comes with a very self-adhesive film durable that can be peeled and stuck in place without the need for drilling (wait 24 hours after installation for best results). High quality material: Child Safety Window is made of thick ABS + zinc alloy locking clips. Rust and abrasion resistant, durable. Note: The window lock chain length cannot be adjusted, the window opening distance is maximum when 'it is installed horizontally and minimal when installed staggered. Wide range of applications: child safety locks are suitable for different types of windows, cabinets, refrigerators, drawers, door stops, etc.