Fire protection is a large part of selecting a vault door. I look for some sort of fire resistant material in the door and make sure it has a quality fire seal around the door frame. Another thing I have learned about fire protection is making sure the vault door stays rigid and sealed if exposed to heat. Steel thickness helps with the rigidity of a door and keeps the door in contact with the fire seal in case of a fire. I don't want a door that will bend or flex. If the vault door bends or warps because of heat and loses contact with the fire seal, fire can enter into the vault and damage the contents. The thicker the steel the more rigid a door will be. But watch out for the weight of the door. More steel means a heavier door and that brings me to the next point.
Easy-to-use bank vault door for sale make it more likely the vault will actually be used. If the door is too heavy or difficult to open, it will not get used as often. Your room will often determine if an in-swing or out-swing is best. If you select an in-swing door, make sure there is enough clearance. The last thing you want is to only be able to partially open the door. Out-swing doors often open a full 180 degrees so you have maximum clearance when putting things into the vault. The internal opening device should be easy to open; especially for a child should they happen to find themselves on the inside. Also, consider the installation of the door. Is it something I can do myself on the weekend or do I need to hire a professional?