I need to remove my super damper to replace my timing chain. Anyone know what size those 3 odd looking bolts are . Looks like a E socket but none of mine fit

 

Called ati . 5/16 12pt socket

 

Do you happen to remember what thread of bolts you used to thread into those holes for the puller? I'm gonna be doing this overnight and won't be able to run to the hardware store for bolts. I do have the WMW puller and the bolts that come with it.