A Crucible Dalek
The Crucible Daleks were Daleks onboard the Crucible. They were fitted with specially designed manipulator arms in order to handle machinery.
Stolen Earth/Journey's End []
The Crucible Daleks were the designated guards of Davros. Three were known to guard him in order to prevent him from taking over the Daleks again. Several others were seen handling the machinery onboard the Crucible.