When working as a mobile locksmith they spend most of their time on the road. They may have set hours but could also offer 24 hour locksmith services. They are the ones that assist clients in their homes or drive to where they have either locked themselves out of their car or home.
The locksmith will lubricate the plug with a lubricant spray like WD40 but do not use graphite. Use a long pick that ends with key like ridges to distribute the lubricant through the lock tumbler. The long picks are called a rake pick. The next step is to use a tension tool that will fit the keyway snuggly. The locksmith will start using very light tension before they turn to stronger methods. If there is too much tension it can weaken the drive springs. These are what keep the pins in place inside the lock.
Being locked out of your home, auto, or business can happen at any time and when this happens you need someone to come immediately to remedy the situation. Although you may never need the services of a locksmith it is a good idea to have the name and number of a reliable and dependable 24 hour locksmith handy for emergencies.