You Will Get The Window Restrictors for item with 2 x Window Door Restrictors and 3M glue and 2x key. .High Quality Material: The window catches for UPVC windows is made of ABS and zinc alloy material, 304 stainless steel lock core, surface electroplated zinc alloy safer and more flexible, anti-corrosion anti-rust and durable. .Smart Desigened: Window cable restrictor lock with special limitation design 19cm safety cable provides a 11 to 18cm restriction and make fresh air in. It can prevent a child from or falling through the gap, and window can be opened fully after the cable being removed for one end by Using the Key. .Easy to Lock & Unlock: The Window Can be Opened Fully after the Cable being Removed for one end by Using the Key. Window lock has a special restriction design, you can open the lock by turning the key.