1. Window opener: This safety lock is a simple device to install that limits the distance a window can open, perfect for home and business security. 2. No screws required: This window reducer does not require screws for installation. Clean both sides of the window surface, then peel off the sticker on the back of the window lock and attach it to the window. 3. Excellent security: This window lock helps prevent accidents caused by open windows and provides added protection for children while deterring unauthorized access. 4. Multifunction locks: This window safety lock can also be used on refrigerators, cupboards, and other applications. Suitable for homes, hospitals, hotels, schools, and commercial settings. 5. Easy to install: Once the cable is in place, the window opening distance is limited. Use the key to remove the cable from one end for full window access. Fits most window types. Constructed with integrated stamping to shape the shell, providing resistance against prying and breakage. Tensile resistant, durable, and long-lasting. Smooth surface design, rust-resistant, wear-resistant. Installation: Adhesive tape Unlocking method: Key switch Size: 5.65 x 3.85 x 2.4 cm Material: Carbon Steel / ABS Color: Black / White Package Contents: 1 x Security lock 1 x Key Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement allows an error of +/- 1-3 cm.