Locksmith (Fallout 4)

Locksmith is a perk in Fallout 4.

Effects
While the first 3 ranks are required to access the different levels of lock, level 4 has a significantly higher level requirement (over twice the level of rank 3) and instead makes your picks unbreakable. The usefulness of this rank is questionable as by the time the player reaches level 41 there is a good chance they will have several hundred lock picks.

However a useful side effect of the picks not breaking is that the players pick rotation will not be reset after it breaks. This makes it easier for the player to pick harder locks as the player no longer has the issue of losing their place when a pick breaks while just off the sweet spot.