Product information: The window lock lever is made of steel with a zinc alloy knob that is durable, long-lasting, and not easy to rust. The window locks can be installed on windows that open to the left or right. Product advantages: The tip-proof window angle is a practical part of your home, with which you can properly ventilate your apartment and control and adjust the opening of the windows according to your needs. Our window latches prevent windows from being easily and effectively opened or closed by drafts or wind. COMFORT: Perfectly protects the window from impacts or opening in windy weather, which increases the comfort of using the window. For swing, tilt, and turn windows, also for balconies and patio doors. Can be used as protection for cats. Instructions for use: After installation with screws, the function is simple, just turn the knob to adjust the window's opening position. Keep doors and windows closed. Packaging: 1 * Stopper Material: Carbon steel Surface: Polished chrome Note: Due to the different images shown, the actual color should apply. The dimensions are measured by hand, there may be errors (1-2 cm).