You will receive a Christmas card as a gift for Christmas Day. The security lock window restrictor is designed to limit the opening distance of windows and doors to help reduce the risk of injury from falls. Suitable for most casement, wooden, PVC, and aluminum windows and sliding windows, including horizontal and vertical types. Safe solution to help prevent children from pinching their hands when opening or closing windows or doors without adult supervision. Helps prevent babies and children from accidentally falling out of windows or exiting through doors. Also effective for pet safety. The window restrictors are adjustable and allow ventilation while providing protection. Two opening sizes available: 5.12 inches (13 cm) and 6.30 inches (16 cm). Adjust the opening by changing the circular knob and setting the desired spacing. These window limiter locks come with strong adhesive for secure attachment without drilling. Simply peel off the protective film and attach directly to windows or doors. Optimal adhesion is achieved after 24 hours. Easy to remove using a hair dryer without damaging the window surface.