Baby safety lock: 2 cable vents Designed for child safety, limiting the window opening distance, safe ventilation. Ideal for Window Door Security. wood, aluminummetal, always tested to standards. Easy to Install: Can be easily installed on windowsfour screws. Limits the distance a window can open. It can be removed from one end by using the key, the windows can be opened fully. Flexible cable at the length of 19cm (visible) allows you to open your window approximately 10-19cm to effectively prevent children from cause accidents due to over-opening the window, to prevent pinchingcats can finally get in/out without opening the doorwindow widelocking themselves in the house!Keys provided: Can be lockedunlocked in seconds. Suitable for all materials: Suitable for most types of windowssmall doors. Screws provided. Always think about the safety of children like your doll, pet, loulou, son, daughters etc. Are you thinking about the precaution against burglary. Our product is applicable to almost all windowspatio doorsthey are easy to install. For Casement WindowsFor Tilt Windows For Tilt & Turn Windowsused in hospitals, hotels, homesschools, etc