The Master Lock 5400EC Portable Lock Box is a large black metal lock box designed to hold up to 5 keys. It features a combination lock mechanism with a 35mm shackle size, making it suitable for holding and accessing multiple keys securely. This portable lock box is suitable for storing money and has a security rating of A, providing reliable protection for your valuable items. Additionally, it is water-resistant, weather-resistant, and has a fire rating of 30 minutes, ensuring your keys and belongings are safe in various conditions.