These safes feature quality heavy duty construction. They are made to be installed into a concrete floor or block to protect your valuables. They come in four sizes and have a sturdy cover plate that when mounted on the safe and a rug put over it, allow a person to walk on it without knowing it is there. It comes standard with a combination lock to open the safe and it has hardplate and two relocking devices to protect the safe from being opened in a drilling attack. It has a large door opening with a three way locking plate and drive resistant door jamb. The hinge allows you to easily lift the door after opening the combination lock.