The Ultrasonic Screwdriver

The Ultrasonic Screwdriver can be found on the corpse of any mechanical in the pools surrounding the Fizzcrank Pumping Station.

As a quest objective
This item starts The Ultrasonic Screwdriver (quest).

Trivia
The Ultrasonic Screwdriver is an homage to the sonic screwdriver, seen in the BBC's Doctor Who series. The Doctor, a Time Lord from the planet Gallifrey, uses the sonic screwdriver to open doors and activate/repair/disable various mechanical devices.

One of the Doctor's companions, Romana; who ironically is also a Time Lord (the more political correct term is Time Lady) also uses a sonic screwdriver - one that even the Doctor himself wanted to steal from her.