When it comes to locksmiths, their name says it all. A locksmith service specializes in locks and can help people unlock doors. If someone gets locked out of their home, car, or business, they can call a locksmith who will then unlock the door.
That said, locksmiths offer many other services.
An automobile locksmith, for example, can fabricate a new copy of someone's key. This way, the person involved can have an extra key. Often, having a locksmith make the key is cheaper than having a dealer do it.
Locksmiths can also rekey locks, and if needed, replace the hardware altogether. Locksmiths can also reinforce doors so that they're harder to break down. On top of that, a residential locksmith can help parents “childproof” their doors so that a child doesn't sneak outside. They can also help folks install gates to keep kids away from dangerous things, like a pool.
Ultimately, locksmiths are security experts, and as such, they can help businesses control access, protect valuable stuff, ward off crime, and install things like panic bars. At the end of the day, locksmith services are often flexible and can help with many different things.