Durable All-Metal Construction: Made of aluminum alloy and coated with high-temperature Teflon paint, our window restrictor set is built to last. The rust- and corrosion-resistant design ensures a long-lasting glossy finish, while the thick rivet anchoring ensures exceptional strength and durability. 4-Position Adjustable Design: Our window tilt adjusters feature a versatile 4-position design, allowing you to customize the opening angle of your windows for optimal ventilation and keep your windows securely fixed at the perfect angle for indoor air circulation. Easy Installation: Each window restrictor comes with 4 screws for hassle-free installation. Simply use a standard screwdriver to secure the restrictor in place on the left or right side of your window frame. No complicated tools or professional assistance required. Universal Compatibility: Suitable for all standard window and door frames, our tilt control kit prevents accidental window closing. Whether you have wood or metal windows, our window stops provide the flexibility and peace of mind you need to ensure security and ventilation throughout your home. Versatile Use: Beyond ventilation control, our window restrictor set offers versatile usage options. Use them to limit the opening of your windows to improve ventilation, enhance child and pet safety, or prevent unwanted access through windows and doors.