We decided to purchase a large safe to keep our valuables in. This arrived quickly and was a snap to put in place.There are 4 holes: 2 on the bottom and 2 on the back. There are large bolts to attach this to either your floor or a wall stud. Simply pull back the inner fabric/vinyl and secure the bolts then cover them back up. Once in place: it does NOT move.Add 4 AA batteries to the harness that fits into the top of the door and then you can start to do your programming. You can add multiple access codes or simply use the keys (one master, one unique) to open the door. There is an alarm that sounds (loudly) if you've entered the wrong number 3 times, but you can turn that feature off as well.The dimensions are accurate to the listing and the door is very heavy. The inside of the door has hangers for keys, jewelry, etc. When you've opened the door, the interior LED light will come on and illuminate the area. The shelf is adjustable. The small inner safe can only be opened with keys (no combination) so you can keep smaller items extra secure in there.Very pleased with the quality of this.Nice safe wasn’t the size I ordered but works out good for every day use very pleased with it