There is one part of the island where you use it to break glass to make an escape route because the entrance you originally came through you can't get back out of because of a thing that fires water at you.
Hope this helped!
:)
it is in sully's steam powered paraphernalia
It is in a junk pile inside Sully's (to the left).
you break it with your rubber mallet.
Idk but im right here with you i totally forgot it
You find it on the island al the way to the left.After that, you break it with the mallet and pour it on the hot thing to get into the building
If you are talking about skullduggery you use it to hit the gong to scare the fish. If you are talking about steamworks you use it to get out of the greenhouse
You return the key and the alarm will turn off and go get the mallet and come back and get the key.
use the crab.
You need the key, which is in a closet in the lab in the Production Zone (far right). Get the mallet from Sully's and the beaker from the museum before you go there. (see the related question)
its in the museum on mainstreet of steamworks island :)
The island opened to general use on September 9, 2010, concurrent with a new island map. Steamworks Island will normally be in the center or bottom center of the map.
You use it when the time comes. In the Production Zone (far right, across the Drawbridge) you recover the Steam Motor and the key to the Living Quarters. To escape, you climb up and smash the glass dome with the mallet. You will also need the dirty beaker from the upper right inside the Museum.