I’ve not found a any commercial nocking point pliers for setting brass nocking points on strings skinny strings and the ones I've tried for larger ones don't work so well so a cheap set of mini lineman’s pliers was attacked with files and sandpaper.
The back notch sets small nocking points, the front one does medium ones and the the pointy part between them is kinda tapered so it’ll spread open both sizes. The flat part up front is used to slightly crimp a point when initially installing it on a string.
4 strand Astroflight with a small nocking point and 6 strand Astroflight padded with 2 B-50 strands with a medium nocking point are shown in the pic.
If you try this, be sure to get cheap pliers- typically they have soft steel so they are easily hacked with files. A Dremel could be used but files worked better for me.
c.d.