They are not shirk because:
1- In some communities they represent the cut hand of Abbas (a), so it’s just a reminder of his sacrifices at Karbala.
2- Or it’s a reminder of the 5 members of the Kisaa’. It reminds of their values. They aren’t to be worshipped for them to be shirk.
(As for Nazar eyes) We don’t have anything in our hadith on the . It does not have Islamic origins