Lockpicking

Lockpicking is, of course, the skill to use lock picks or other tools to open a lock without destroying it. As a matter of principle you need fitting tools to even try it. If you just have a bobby pin or a piece of not very strong wire, it's already enough for a primitive lock.
There are of course bonuses if you come up with a bag full of high end lockpicks. If it isn't a stealthy nightly burglary, maybe a bonus because you can work loudly and with good lighting.
Handicap, as usual, for a lack of easing factors and – especially – the complexity of the lock.
Lockpicking is also used for electronic door and container locks, but to open these you'll need more than a bobby pin – for that you'll need an electronic lockpick.

The starting value is: 10 + P + A