Packing List: You will receive a window limiter set including 2 window tilt adjusters, 2 metal accessories and 8 screws. Helps you determine how far your windows open for better ventilation. Quality Material: The all-metal limiter is made of carbon steel and has been painted with Teflon high-temperature paint, which is rust-proof and corrosion-resistant, with stronger gloss and more beautiful appearance. The thick rivet anchor, after multiple high-strength tensile tests, is not easy to break and durable. Intimate Design: The 4-position design can meet your needs for opening and fixing the window at different angles. Tilt window stops keep windows at the perfect angle for indoor ventilation and can also be used as a safety device for cats and children to keep them out of harm's way. Easy to install: Each window block comes with 4 screws. The screws can be easily screwed in with a simple screwdriver. You can fix it on the left or right side of the window as you like. (Note: Please do not install the window block and the base parallel to each other). Wide application: The tilt control is suitable for all standard window and door frames to prevent accidental closing. Whether you have wooden or metal windows, our window stops give you the flexibility you need.