7 mm thin-wall tube spanner or hex socket

[David Herbert]

I am not sure why there is mention of deep sockets above but surely it is possible to grind the outside of a 1/4" drive 7mm socket until it fits. This could easily be done by eye, holding the socket by a long 1/4" drive extension and using either a bench grinder or an angle grinder held still by someone else or even ratchet strap it to a pallet (for example). Just go slow and don't try to take too much off quickly. It doesn't need to look pretty, just work.

David