Compact, minimalist utility knife holder inspired by the Milwaukee FastBack—but shrunk down to keychain size. This isn't a rugged workhorse; it's a sleek, everyday carry tool that fits right on your keys.

If it gets confiscated before your flight, just print a new one. 

Bit size is a press fit, may vary according to your printer/settings. You can drill out with 1/4" if too small or heat and compress if too large.