This is what it is, it is a pocket blade sharpener. HHg-olden years said:hmm, you may want to also post it on "What is it?" forum where you'll have greater chance of finding someone who recognizes this item. Seems no one here is responding for same reason I nearly didn't, since my knowledge on this is limited to "dunno" and "duh". Blade sharpener does seem likely though. HH Andi