The Window Restrictor Lock is Made Stainless Steel. and the Sturdy Materials Give You a Sense of Security. 4 Pcs Windows Restrictors Limit the Distance that a Window Open. They can be Removed from one end and the Window can be Opened Fully With Keys. Perfect for the Children Safety and Anti-Theft. This Baby Safety Windows Lock With Keys and Screws, Complete Accessories, Easy Installation. Perfect for Home, Public and Commercial Applications. This Window Restrictor Suitable for Most Types of Windows and Small Doors, Suitable for Many Kind of Materials Such As Wood, Aluminum and Metal. Package Included: 4 x Window Door Restrictors4 x Release Keys16 x Screws. Product Description Description: 100% Brand New and High Quality! The Lockable Cable Window Restrictor is a simple to fit device that limits the distance a window can open, ideal for home & commercial safety. When the cable is in place the distance the window can open is limited, by using the key the cable can be removed from one end and the window can be opened fully. Suitable for most types of windows and small doors. Perfect for home, public and commercial applications. Specifications: Type: Window Door Restrictor Quality: 100% brand new Material: nylon + steel wire Size: as shown Color: White Quantity: 4 pcs Features: KEY OPERATED, Child Safety Security Locking