The material is made of high-quality material, which can withstand higher pressure and is not easy to damage. Superior Safety High-quality cable chokes improve home safety, health and safety, and baby/child safety. EASY TO INSTALL Made of 19cm long wire with self-drilling screws and wrench, just a screwdriver or drill can be installed. Widely used in PVC, aluminum, wood, composite doors and windows. For double-hung windows, swing and sliding balcony doors, guest room doors, etc. The special restraint design provides a 19cm restraint and provides fresh air, the window can be fully opened once the cable at one end has to be removed using a key.