If you have a screwdriver bit to fit a sq. drive socket wotsit they're fairly easy to remove.
With an ordinary driver you cannot usually get straight on to the buggers, neither can you get enough torque.
Put the bit in the slot. then almost
close the jaws on the ratchet thingy. The bit cannot cam-out 'cos the other jaw stops it. Crack it off then do the others likewise.
Did mine a few weeks ago, so I can now fit ally soft jaws when required instead of the serrated 'bar-chewer' edition they come with.
( Record #3 in my case)
EDIT oops, sorry, noticed you've got it apart ....