The only truly honest answer anyone can give you is... I don't know.
To some people, as has been mentioned here, half moon or S shaped spanners have
saved them hours of work.... For other people, they have had them for years and never
used them... I fall into the latter camp, and I spend good money on a good set thinking
they would be so useful and never needed one......YET. Maybe that day will come, maybe
it won't.
So to definitively answer your question.... Do you really need these..?
The answer is obviously...
Probably maybe definitely possibly 100% absolutely yes no.
... and don't let anyone tell you any differently.
