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