Picklock is a skill in Wasteland.
This can get you into places where you want to go, but where other don’t want you to go.
Very useful specialist skill (for one or two characters). No tools are necessary. Just use the skill until either it works, or you give up and use some other method of opening the door. Most of the AT weapons and Explosives can function as very, very crude door openers.
Good places to train picklock skill: Stage Coach Inn (up to level 3), Ugly's Hideout (up to level 5), armory room door at the Police station in Needles (up to level 6), northwestern door in the jail in Las Vegas (up to level 7).