Interesting socket set in Lidl the other day. Has a hole down the middle so can be used with nuts on a long stud, etc. Unlimited length unlike deep sockets. Much the same use as a ratchet ring spanner, but these can be too bulky to fit where space is tight.
Socket sizes in the kit are 8 and 10-19mm. Includes an adaptor to allow standard 1/2" square drive sockets to be used with the ratchet handle.
One of those things which could be very useful when needed - or lie around unused for ever. ;-) At 17 quid, thought it worth a punt.