"In the novel Idoru, William Gibson described a character as having such a tool. "The stranger's hand emerged, holding something that looked to Chia like a very large pair of chromeplated scissors, but then unfolded, with a series of small sharp clicks, and apparently of its own accord, into a kind of glittering, skeletal axe, its leading edge hawklike and lethal, the head behind it tapering like an icepick."Excerpt From Idoru, by William GibsonOf course, he's also the inventor of the famous "razor-girl" Molly, with ten surgical scalpels implanted under her fingernails, like the scariest cat's claws."

"I wish this was available on US Amazon or similar. All I see, despite a very focused search string, is the usual suspects."

"I'm getting strong vibes of Ghost in the Shell (later TV anime, not the feature film) with these. https://ghostintheshell.fandom.com/wiki/Tachikoma"