Thread size of bolt holes for steering wheel puller on GTS steering wheel?

[Wally]

Hi All, I'm needing to remove a GTS steering wheel from what I think is a HQ steering column that is fitted to a street rod. What is the thread size of the two bolts holes to which I'd thread the steering wheel puller to? 15/16 is too big and 3/4 too small and 7mm doesn't seem to fit either. Thanks in advance

So that means it's between 12/16 and 15/16. 7mm is around 5/16.