Home Safety: The outward window lock helps limit the opening width and helps keep your children safe and prevents them from getting their fingers caught or falling. PERFECT FOR MULTI-STOREY HOMES AND APARTMENTS: Window safety is one of the most important parts of child safety, especially if you live in a high-rise building Easy to install: our window latches are a great addition to your home security list and are easy to install with the included installation template and screws. Fits most exterior windows: the exterior latch can be easily fitted to most outward-opening windows, including wooden frames Adjustable opening width: our inward-opening window locks can be adjusted from 0 to 100mm, there are multiple stops between 0-100mm so you can adjust to your desired width .