deano long nose pliers wont do it
deffo need wind back tool, halfords do them, the brand is Lazer they cost about a tenner, without this you will NOT be able to do the job
if your fitting new discs you will need new bearings as they are pressed into the disc, and its a difficult job to get em in withot a press, i used a piece of bar which was same dia as the bearing and knocked it in carefully