Rear brake pad change - HELP!

Hi chaps.
I'm midway through changing my rear brake pads, but I cannot get the pistons back in.
Been trying for a good hour now, twisting them clockwise but they just will not budge!
HELP PLEASE!
Jake
 
I got there in the end! Just about. Lol.
Used a g clamp to compress it, whilst using an angle grinder spanner to turn it.
Sounds a bit dodgy, but it was fine.
Just couldn't compress it enough with my hands! Haha
 
You can pick up the tool for not much money in halfrauds mate, that way future changes can be done quicker :smile: