Made of high-quality material, designed to withstand higher pressure and resist damage. Provides excellent safety with a durable choke cable, enhancing home and child safety. Easy to install with steel wire measuring 19 cm in length, includes self-drilling screws and wrenches; requires only a screwdriver or drill for setup. Suitable for use on PVC, aluminum, wood, and composite doors and windows. Ideal for double-hung, casement, and sliding windows, as well as balcony and bedroom doors. Features a special limiting design that allows 19 cm of controlled opening for fresh air, while permitting full window opening when the cable is removed from one end using the included wrench. When installed, the cable limits the window opening distance. The cable has a flexible design with smooth lines and a bendable structure, offering up to 18.5 cm of usable length. Equipped with a unique locking core that enhances door security. Package includes: 4 pieces.