A. The product is made of good materials, which can withstand relatively high pressure and are not easily damaged. B. The choke cables provide protection for household safety, health, and the safety of infants/children. C. It is made of a 19 - centimeter - long steel wire and 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 sliding windows (up - and - down), casement windows, and sliding windows; balcony doors, guest room doors, etc. E. The special limit design can limit the window to open 19 centimeters to let in fresh air. After pulling out one end of the cable with a wrench, the window can be fully opened. When the cable is in place, the opening distance of the window is restricted. The cable can be removed from one end using a wrench to fully open the window. F. It has a novel shape with smooth lines, can be bent freely, and the cable spacing can reach 18.5 centimeters. G. The unique lock cylinder design improves the security of the door lock. H. The package includes 4 products.