Made of high-quality materials, this product can withstand higher pressure and is not easily damaged. High-quality choke cables enhance home safety, health, and child safety. Easy to install, it is constructed from steel wire and measures 19 cm in length. Includes self-drilling screws and a wrench; installation requires only a screwdriver or drill. Suitable for use with PVC, aluminum, wood, and composite doors and windows. Ideal for double-hung windows, casement windows, sliding windows, balcony doors, and guest room doors. Features a special limit design that allows locking and unlocking, providing a 19 cm opening limit while allowing fresh air circulation. Use the included wrench to release one end of the cable for full window opening. When engaged, the cable restricts the window’s maximum opening. The sleek white design has smooth lines, is flexible, and offers an effective line distance of 18.5 cm. The unique locking mechanism enhances door security.