Utility knife in azipper-pull
by Cory Doctorow from on (#CPQM)
Gerber's GDC Zip Blade measures 1.7" when closed and is intended to be used as a zipper-pull (it has a quick-release) -- the 0.68" blade locks open for a total length of 1.7" (there's also a multidriver and hexkey version) (via Canopy)