Unscrewing brake pivots

the pivot has two flat sides and as its the frame i cant fit it in the vice and turn the frame,the 2nd pivot gets in the road :?
Bigger spanner maybe,maybe even leave it well alone :?
 
you will find a way to get it in the vice and get maybee a third of a turn
possibly enough to free them off to spanner it out

they can be a complete *astar* to get out tho
 
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