What are these?

heyslugger

New member
I am fixing to help a friend sell a 94 Yo Eddy and while I was looking the bike over I noticed these bolts in the frame. I know Old Schwinns and vintage BMX bikes but very little about geared MTBs. Can someone clear this up for me? Thanks. I feel like this is going to be a 'rookie ask' but if I dont ask I wont know! Thanks ~ D

 
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