Facom R.180PB 180° flexible head 1/4" compact ratchet
By: jarkman
More info: https://www.facom.eu/uk-en/generaltooling/productdetails/hierarchy/7180/group/R.180PB/
This thing does many different screwdriver things, while remaining very compact. I think it may be the tiniest way to be able to drive full-size bits.
I printed a TPU clip to keep the two parts together, and a TPU bit holder
Some similar ratchets are available in the bike tool market
and as hex or Leatherman accessories from 711L