Utility Cutter Set Snap-off Razor Knife Scraper Carton Box Knife Envelope Opener

All the cutters in this set are made from flimsy, cheap plastic. The blades are not even very sharp and 3 of the blades have already started rusting before I used them. (no they did NOT get wet, were just sitting in misc. tool drawer.) Two of the cutters would not even work, as locking mechanism would not function.AVOID