The main body of each secure key box is made of high-strength aluminum alloy, providing anti-corrosion properties. The aluminum alloy construction helps protect the key box from hammering and sawing, helping to secure your belongings. The key box offers internal space in a compact, portable design, allowing you to store multiple keys and small personal items as needed. This secure key box features a removable handle, enabling hanging on door handles, doors, fences, cars, or other locations, indoors or outdoors. No installation tools are required, and it can be removed at any time, similar to a standard padlock. The key safe uses a 4-digit combination lock with 10,000 possible combinations, offering enhanced security compared to 3-digit models. You can set or reset your preferred code in minutes. The outdoor key box is compact, portable, and built for long-lasting performance. For both indoor and outdoor use, it is ideal compatible with applications such as rentals (Airbnb), garages, offices, schools, and warehouses. Color: gray Package includes: 1 piece