This weapon functions identically to the Wrench, but with an added cosmetic function: any enemies killed by it will turn into motionless golden statues of pure Australium instead of ragdolls. This gold effect applies to jiggle bones which freeze in place.
This weapon was a promotional feature of the Engineer Update. Players were informed that every time a craft was made, there was a chance of a Golden Wrench being awarded. Only 100 Golden Wrenches were available at the time.