Because the lock picking tools are burglary tools, without a valid locksmith license, you cannot buy or carry picking tools by yourself in most of the states. For locksmith supply stores, it is illegal and punishable by law to sell picking tools to someone who is not licensed as a locksmith. Getting locksmith license in each service area involves a complete background investigation and getting registered with the area police department, that way it is always known who picked the lock on your door in case of a dispute.