A. It is made of materials that can withstand relatively high pressure and are not easily damaged. B. It is equipped with flow-resistant cables to ensure safety and health in the home environment, especially paying attention to the safety of babies/children. C. It is made of a 19 - centimeter long steel wire, comes with self - drilling screws and a wrench. Installation can be completed with just a screwdriver or an electric drill. D. It is suitable for PVC, aluminum, wooden, and composite doors and windows. It can be used for double - hung windows, casement windows, and sliding windows; balcony doors, guest bedroom doors, etc. E. The special limit design can achieve a 19 - centimeter limit and ensure ventilation. After pulling out one end of the cable with a wrench, the window can be fully opened. F. It is white in color. G. When the cable is in place, the opening distance of the window is restricted. The cable can be removed from one end with a wrench to fully open the window. It has a shape with smooth lines and can be bent at will. The cable can be stretched up to 18.5 centimeters. The lock core design improves the safety of the door lock.