Cars, homes, and businesses still rely on locks and keys. Often, locksmiths have to replace these locks with similar products. Some customers like these models because they are low-cost. Usually, these mechanical systems are easier to install.

Locksmiths use both lock picking and bumping to legally gain access to properties and vehicles, where it is permissible to do so by law and they have the property owner's consent. Lock picking is generally the less damaging of the two, although it might be necessary to change the locks afterwards.

craftsman who works with locks and keys. A locksmith is a person who works with locks, keys and security systems.

If you've ever locked yourself out of your house, the person to call for help is a locksmith. When you need a new copy of your apartment key, you can also visit a locksmith. The word comes from lock and smith, from the Old English smið, "one who works with metal."