thank you

is that a flare spanner ? is the head on a flare spanner thinner than a regular spanner ? I have about a quarter centimetre gap per side, also is the opening wide enough on thee flare spanner as they look more like a c shape ?

I see the flare spanners on ebay, just don't want to wait for a few days just to discover they are the wrong ones, please help and thank you again for your help.

edit: just saw the pic on the link you posted, not sure that will do it as there doe not look enough room imo what about this type ?