// o x-acto

X-Acto is a brand of tools owned by Elmer's Products, Inc. These tools include knives, saws, tweezers and many other small-scale hand tools used for crafts, hobbies and other applications. [...] The original knife was invented in the 1930s by Sundel Doniger, a Polish immigrant to the United States. He had planned to sell it to surgeons as a scalpel [bisturi] but it was not acceptable, because it could not be cleaned. His brother-in-law, Daniel Glück (father of poet Louise Glück), suggested that it might be a good craft tool.

in Wikipedia