Focal adjustment spanner
A focal adjustment spanner
A focal adjustment spanner was an engineering tool.
While working on Daystrom Android M-5-10 in 2401, Commodore Geordi La Forge asked Ensign Sidney La Forge to hand him an ionic flow regulator. His daughter corrected him that he needed a focal adjustment spanner instead, for the golem's main port. (PIC: "The Bounty")