I’m not talking about a hex key that extends in length but one where it can collapse in on itself to increase in size.
I did some digging online but all I could find was a patent from a company called TeleHex but it kind of sounds like they came and went in the mid 2000s. They’re website doesn’t seem to exist.
I feel like it could save space in my pocket compared to a typical hex key set or a multibit.
I was hoping I could at least find a bootleg version on Ali Express.
Might be workable if you settle on combining only 2 to 3 keys (small, medium, large) per hex.
Or, learn metallurgy and material science to find some new polymer or alloy that would be strong enough.
But honestly, it sounds like a really expensive endeavor that even if you made it work, isn’t practical enough to justify the cost.
Maybe something like the universal socket wrench style could influence a design that’s workable as a multi-hex, and be made cheaply enough.