What type of head are the toe rail screws?

[Lyra]

Looking at them they look like Philips but not exactly - the slots seem to be a bit shorter and the inner corner a bit round.
Or is it a Philips and only because of the size they seem a bit more "open"?
If it is - what Philips size is it?

[Rampage]

I had to remove the aft fairleads on Rampage to repair some damage.  I used a Phillips driver bit to do the job and it worked fine.

[Yngmar]

It's a Phililps (and not a Frearson). https://en.wikipedia.org/wiki/List_of_screw_drives#Frearson