That's the type I have. It's not a Q-Max brand, it's RS
(
http://www.rswww.com/ IIRC). I've never seen an odd-shaped genuine Q-Max
cutter (I know they did make sqyare and rectangular ones, though).
There were some odd-shaped ones like DB-9 and -25 and SO239 with a flat
on one side for nut fixing sockets. I've not seen any for years, and
I would have bought them if I had :-)
What, genuins Q-Max ones? I know RS sell (sold?) some odd/useful ones to
fit common components (although I don't recall seeing any
circular-with-flat ones).
-tony