SafetySecurity window locks limits the distance that windows can be opened, it is ideal for home, public and business safety, and it is also specially designed for child safety. Provide Extra Security, Health and Safety at Home and Baby/ Child Safety. High Quality MaterialsMade of high-quality zinc alloy cable materials, can withstand greater pressure and is not easy to damage. Cable length: 19cm. Easy to Locked and UnlockedThe Restrictor Window Locks With Limitation Design of 19cm Safety Cable, Provides a 11 to 16cm Restriction. The restricted window position can effectively prevent children or pets from crawling out of the window, while also ensuring indoor ventilation. Easy to InstallSupplied with 4 fixing screws 1 key, Just a Screwdriver or Drill to Install, Quick easy to fit. After the cable is in place, the distance that the window can be opened is limited. After pulling out the cable from one end with the key, you can open the window completely. Various UsesSuitable for Most Types of Windows and Small Doors. Suitable for home, public, hospital, hotel, school and commercial applications.