[smileybarry]

They're the normal "Security Key NFC" version, so just FIDO2/WebAuthn uses. But you can generate FIDO2-based SSH hardware keys on them: https://news.ycombinator.com/item?id=31556130

[smileybarry]

I just got the email and they’re the full YubiKey 5/5C NFC ones, so this is actually a really good deal.