Archived from the Tools In Action forum (Hand Tools). This thread is read-only.
It looks like it can be Phillips PH0 or PH00, but your photo is quite a wrong photo, you have not mentioned what this is, what is the size of this item, so I could guess the size of screw depending on that, but it seems to me it is a small size screw. So maybe PH1 also would be the right size.

