I called the manufacturer today, I suggested making the holes in the handle 15mm,14mm,13mm. Box end instead of just round.
He said no problem as they are c&c cut , it could be done.
He said the wrench would be plenty strong for wheel nuts on a bike.
I told him there is a real need for a multi wrench that is light for cycling.
He said, Thanks for pointing that out it had not occurred to them .
He asked me to call back, after receiving my wrench to get my impressions.
So we may have a strong but light multi tool that dosen't brake the bank.