A pair of posable hands for the Dark of the Moon Leader class Ironhide figure! Each finger is double-jointed, the wrists and thumbs are also ball-jointed, and the hands still fit behind the windscreen in his alt mode!
Not for casual collectors. You will need a dremel and some skill to install these hands.
I recommend these to be printed in Strong Flexible material for maximum reliability.Radicon thread here.
(With installation instructions)Flickr gallery here.