Gyromatic Micro-Adjustor

The Gyromatic Micro-Adjustor is a tool that was invented by Gelbin Mekkatorque and used by engineers to make a variety of items. Like a Blacksmith Hammer it is not consumed when crafting an item. It is just a screwdriver.

Gnomish Army Knife has an in-built Gyromatic Micro-Adjustor (and whole bunch of other stuff).

Source
Gyromatic Micro-Adjustor is created by Engineers with a skill of 175.