Based on 3 r/BuyItForLife mentions

Classic SD Swiss Army Knife

$24.00

Victorinox

The Swiss Army knife you can take with you anywhere with more than a century of proven functionality. The Classic SD easily disappears onto your key chain ready to make a grand entrance every time you have a problem that needs solving. Small, but full of class, this pocket tool will escort you through your business life and your leisure. With 7 functions including both nail file and screwdriver and a host of matching accessories makes this the easiest lifetime commitment you'll ever make.

Reddit mentions

  • “Got a real Cow Tools vibe about this before I read the caption. My BIFL EDC bits are: - Victorinox Classic SD, on a Nite-Ize S-Biner used as a key ring. - Streamlight Stylus Pro…”
  • “I’d go for Victorinox Swiss Classic or Tramontina ProLine for value and sturdiness.”
  • “Not quite under $50 new, but close. Swiss Army Knife Compact. It has everything you want on a SAK and is still small enough to fit in a pocket comfortably and discreetly.”
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Product details
Brand
Victorinox
Type
Keychain