Henry can search for all five special gears to complete this task for Twisted Alice. All of the special gears are inside the gear boxes, located randomly around Level K. Their lids must be unlocked with the pipe wrench before obtaining the special gear. However, some gear boxes are missing a special gear after unlocking.
During this task, Piper is encountered using the special gear for his left arm and will drop it upon death.
Collecting all special gears unlocks the "Spare Parts" achievement.
There are few differences for the special gear's mechanics before update patch 1.3.1:
The special gear's location can be found randomly around the whole locations besides just Level K.
Henry needs to collect four special gears instead of five.
Piper does not carry the special gear during this task.
The looped sound of the gearbox.
The sound of the gearbox cover opening.
The sound of picking up the gear.
A gear box appeared in-game.
The special gear in the box.
Piper carrying the special gear. (new version)
The special gear's icon.
The gear box's texture map.
An image of the special gear for the "Spare Parts" achievement.