Features: brand new and high quality This flexible window/door cable restrictor is perfect solution to provide a restricted opening of for windows or doors. Specially designed to protecting children from falling out of the window. It also provides an for extra security, the restriction of how much the window can be opened prevents burglars from being able to use the window as an access point. Thhis restrictor is very easy to install and comes with for key. Suitable for most types of for windows and small doors. Perfect for home, public and commercial applications. Specifications: Material: Stainless Steel+ABS Weight: 100g Size: As picture shows Color: Black/Silver Package Includes: 1x Window Chain Lock+Key note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.