Superior Materials: this casement window stay boasts excellent corrosion and rust resistance, maintaining stable performance in both indoor and outdoor environments for worry-free use Smooth And Quiet Operation: utilizing a friction hinge design, it ensures smooth and noiseless opening and closing, completely eliminating the annoying noises common with traditional hinges Reliable Sealing And Weather Protection: performing excellently in various weather conditions, it firmly supports the window frame, effectively resisting wind, rain, and dust, providing reliable protection for your living space Easy Installation: whether replacing old hinges or installing new ones, this product can be quickly and easily installed on various top-hung windows, offering convenient use Wide Compatibility: suitable for various window types, including casement and sliding windows, and compatible with various window frame materials such as aluminum alloy, PVC, and wood, before installation, simply measure the window frame thickness and the width of the stay track groove to quickly select the appropriate size, Manufacturer: MDSIOKHJ