Sounds like they may be C-Record or Croc de Aune. See if a 7mm allen fits,
if so then the bolts are your puller too.
Hope this helps,
Garry Nold
Olympia, WA
Hi Gang, If this is non vintage sorry to the list.I guess I am too vintage because I never got past super record. I just bought a frame with post super record campy cranks. They have an allen bolt with a ring around the bolt that has pin tool holes. How do I remove them? Off list please. Thanks Craig Griffith In cool San Luis Obispo Ca.