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, aluminum, and sliding windows, including horizontal and vertical types. Safe solution to prevent children from pinching their hands when opening or closing windows and doors without 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). Simply replace the circular knob to adjust the opening width as needed. These window limiter locks come with strong adhesive for secure attachment without drilling. Just peel off the protective film and apply directly to the window or door surface. For best results, allow 24 hours for full adhesion. Easy to remove using a hair dryer without damaging the window surface.