Baby safety lock: 2 cable stays Designed for child safety, limiting the window opening distance, safe ventilation. Ideal for door and window security. material: Made from PVC, wood, aluminum and metal, always tested according to standards. Easy to install: Can be easily installed on windows with four screws. Limits the distance a window can open. It can be removed from one end using the key, the windows can be fully opened. Flexible cable at the length of 19cm (visible)allows you to open your window about 10-19cm to effectively prevent children from causing accidents due to excessive opening of the window, to prevent pinching and catswill finally be able to enter/exit without opening the door or window wide or locking themselves in the house! Keys supplied: Can be locked and unlocked in seconds. Suitable for all materials: Suitable for most types of windows and small doors. Screws provided.