Made of high-quality material, able to withstand higher pressure and not easy to damage. Excellent safety performance with a high-quality choke cable for added home safety, ideal for baby 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 installation. Widely used for PVC, aluminum, wood, and composite doors and windows. Suitable for double-hung, casement, and sliding windows, balcony doors, guest bedroom doors, and more. Features a special limiting design that provides 19 cm of restriction while allowing fresh air flow. The window can be fully opened by removing the cable from one end using the included wrench. When installed, the cable limits the window opening distance. New design with smooth lines and flexible bending capability; cable extends up to 18.5 cm. Equipped with a unique locking core that significantly enhances door lock security. Package includes: 4 pcs About shipping: All items will be shipped within 3 business days after payment is received. Delivery typically takes 812 days, depending on location. For any questions, please feel free to . We will respond promptly. Thank you for your support and we hope you enjoy your shopping experience.