I was searching my tool box for a particular size of spanner and I came across three brand new looking flex-head ratchet spanners. I don't recall ever buying any, nor borrowing any, so it's a puzzle. But I was blown away by the awesomeness of these things!

They are open ended at one end and a closed ring spanner at the other end. But the ring has a ratchet inside. So you can tighten stuff in restricted spaces. Turn it over and you can loosen! In addition, the ring end is hinged through 180 deg, so use in constricted spaces is a doddle. I was so taken with them, that I wanted a complete set straight away. Not really for my bike, but they look and feel great!
I got this set of 12 (8-19mm) by Qnkaa from Amazon. They are nicely polished chrome vanadium steel. £34.
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My electrician grandson came and he loved them too, so I gave him the three mystery ones.