TEKTON Long Arm Ball End Hex Key Wrench Set, Inch/Metric, 26‐Piece

If you need a good set of metic and standard hex key wrenches for your wheelchair, I recently bought this set and am quite happy with it. They’re compact enough that they fit in my tool bag and come in enough sizes that they’re guaranteed to fit any of the hex key screws on my chair. You can pick them up here