The pre-drilled holes inside the safe give you an option to have it free standing or permanently fixed with the bolts supplied. The safe comes with 2 backup keys, so in the event of you forgetting your code or the batteries going dead, you can still gain access. The 3-8 number combination gives you thousands of potential codes to keep your belongings safe and secure. This highly secure electronic safe is perfect for use in the home or for a business premises. The Beauty of this safe is the size 23cm x 17cm x 17cm(L&W&H) with the lower price.