Material Made of high quality material, able to withstand higher pressure, not easy to damage Superior Safety High quality choke coils increase safety, health and safety of the home and baby/children's safety Easy to install Made of 19cm long wire with self-drilling screws, just a screwdriver or drill can be installed Ideal for a wide range of PVC, aluminium, wood, composite windows and doors, for double-hung, casement and sliding windows Balcony door, guest room door, etc. Lock and unlock 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, there is a limit to how far the window can be opened when the cable is in place Using a wrench you can remove the cable from one end and fully open the window New shape, smooth lines, can be bent at will, the cable distance can reach 18.5 cm Unique lock cylinder greatly increases the security of the door lock