[EricH]

Originally Posted by dlavery

HAMMER: Originally employed as a weapon of war, the hammer nowadays is used as a kind of divining rod to locate the most expensive parts adjacent the object we are trying to hit -- or thumbs, whichever are closer.

Originally Posted by Hachiban VIII

HAMMER: Used for enforcing discipline.

Combined definition:

HAMMER: Originally a weapon of war, now used to locate the most expensive parts near what you are trying to hit with it. If there are none, it settles for a thumb. Also used to enforce discipline, bend robot frames, and, in its role as "fine adjustment tool," make sure things slide just a fraction of an inch too far, necessitating multiple applications in both directions.