XIANQI is made of high-quality materials that can withstand higher pressure and is not easily damaged. Superior Safety High quality choke coils improve the safety, health and safety of your home and baby/child safety. Easy to install Made from 19cm long wire, comes with self-drilling screws and wrench, requires only a screwdriver or drill to install. Suitable for all kinds of PVC, aluminum, wood, composite doors and windows. Suitable for double-hung windows, casement windows and sliding windows; balcony doors, guest room doors, etc. The special limit design for locking and unlocking provides 19cm restriction and fresh air. Pull out one end of the cable with a wrench to fully open the window. Color: White With the cable in place, there is a limit to how far the window can open. Using a wrench, you can remove the cable from one end and open the window completely. The new shape has smooth lines and can be bent at will, with a line distance of up to 18.5 cm. The unique lock cylinder greatly increases the security of the door lock.