Harland Sharp adjuster size

[mac]

want to purchase a tool like this - https://www.summitracing.com/parts/pro-66779 for adjusting and would like to know what size the allen in the adjuster and size of lock nut on Harland Sharp rockers https://www.manciniracing.com/brb16ratwits.html . car is in storage or i would go and look myself. i can't remember from the last time i made adjustments.

 

[beanhead]

3/16" allen key, 1/2" wrench/socket.

 

[mac]

thanks