The material is made of high-quality material, which can withstand higher pressure and is not easy to damage. Superior Safety High quality choke coils increase the safety, health and safety of the home and the safety of the baby/child. EASY TO INSTALL Made of 19cm long wire with self-drilling screws and wrench, just a screwdriver or drill can be installed. Ideal for a wide range of PVC, aluminum, wood, composite doors and windows. For double-hung, casement and sliding windows; balcony doors, guest room doors, etc. Locking and unlocking Special limit design provides 19cm restriction and fresh air, use a wrench to pull out one end of the cable to fully open the window. Color: White With the cable in place, there is a limit to how far the window can be opened. Using a wrench, you can remove the cable from one end and fully open the window. The new shape has smooth lines and can be bent at will, and the cable distancecan reach 18.5 cm. The unique lock cylinder greatly increases the security of the door lock.