Best response of the month. Maybe even today.Its a 10mm. You will lose it. Its not yours it is just your turn!
Oh! A "mid well"!!While walking I found this Snap On # TMMS10 six point socket. A 10mm to boot!
Perhaps the mechanic was using the SO 10mm on the Matco ratchet.LOL! My theory is a mechanic lost it in a car and the owner while driving it loosen it and it finally fell out. I found a Matco extended ratchet wrench the same way.