Here's an adapter I made for my small ratchet screwdriver. It allows me to use a 7mm socket to change the extruder nozzle. There will be heat transfer to the socket, so keep the contact with the extruder nozzle (while its still attached to the heat block) at a minimum.

The square side has an internal spring retention detent to hold the socket.

I used "support on build plate" with PrusaSlicer and PETG filament