Moving in to a new place is exciting. You buy new things, refurnish, decorate… But, in all this excitement, people tend to forget something important, more then anything else - their personal security. There is always a possibility that the last tenant forgot to give you one more copy, perhaps your superintendent, the building manager, even the renovation company. The only way you can defend yourself from this option and everything that is implied from it is to change your lock. There are man.