Material made of high-quality material, able to withstand higher pressure, not easy to damage. Excellent safety: High-quality choke cable for added safety, promoting health and safety at home and baby/child safety. Easy to install: Made of steel wire measuring 19 cm long, comes with self-drilling screws and wrenches; requires only a screwdriver or drill for installation. Widely used: Ideal for PVC, aluminum, wood, and composite doors and windows. Suitable for double-hung, casement, and sliding windows; balcony doors, guest bedroom doors, etc. Locked and unlocked: Special limiting design provides 19 cm of restriction for fresh air, and the window can be fully opened once the cable is removed from one end using the wrench. Color: White When the cable is in place, the distance that the window can open is limited. Using the wrench, you can remove the cable from one end and fully open the window. New shape with smooth lines, flexible bending capability, cable distance up to 18.5 cm. Unique locking core, greatly increasing the security of the door lock.