If you are looking for the right padlocks to use for your storage units, your best choices are the disc, cylinder and closed shackle padlocks. These are three of the best padlocks that you can choose from for your storage units. But prior to purchasing one for your unit, make sure to ask what types of locks can be used for their units before heading to a hardware store to purchase one because not all facilities have latches compatible with them. To learn more about storage units, check out Fortknox Self Storage.