Grand Cherokee front brake question

Trying to put new pads on the front of a 2014 Grand Cherokee V8. Looks like the caliper pins need an allen style of wrench / socket to insert into the end of the bolts to get them out. Does anyone know what size I need? Thanks in advance!!

I just checked and my 3/8&10mm are both a little loose. Try sticking a 7/16'' bolt head into the socket or an 11mm and see how they fit.