Measure your window track before purchase: Our window locks are designed to fit various vertical and horizontal sliding doors and windows. Please measure your window track before purchasing to ensure compatibility with the lock, with a track height of 0.48 inches (1.2 centimeters) and a width under 0.59 inches (1.5 centimeters). Design features: 1. Window lock with key separation design to help prevent children or unauthorized individuals from unlocking; 2. Constructed from thickened aluminum alloy for durable, long-lasting performance without deformation; 3. Equipped with two fixed holes for secure locking, providing enhanced security; 4. Main body design includes a blocking mechanism that strengthens security when the window is closed; 5. Includes protective washers to help prevent scratching or damage to the window surface. Multi-functional use: Suitable for various applications including homes, apartments, hotels, offices, and more. Allows control over sliding windows, enabling partial opening or full closure to help prevent accidents involving children or pets, and to deter unauthorized entry. Easy installation without drilling: No additional tools or drilling required. Simply position the lock, insert the protective gasket, and tighten the screws to secure. Package includes: 4 security window locks, 4 installation hex keys, 4 protective pads, and 1 vertical key for center track installation. Color: Black. Material: Metal. Package contents: 4 x security window locks, 4 x installation hex keys, 4 x protective pads, 1 x vertical key. The package includes only the items listed above; other items are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.