Safe (also known as safe) is a safe lockable box used to protect valuables from theft and / or fire damage. A safe is usually a hollow box or cylinder with one side movable or hinged to form a door. The main body and door can be cast from metal (such as steel) or made of plastic by blow molding. Bank teller safe is usually fixed on the counter, with a slit opening for dropping valuables into the safe without opening it, and a delay combination lock for preventing robbers and / or thieves. An important difference between the types of safes is whether they are fixed to walls or structures, or whether they can be moved. The less secure Version (for petty cash only) is often referred to as the money box.