I bought these for my students so I would have students always out of their seats borrowing sharpeners from each other. IT turns out it's even worse to give a kid something that doesn't work and listen to the say "Mine doesn't work". The razor in them are flimsy and they bend or they are screwed on at the wrong angle and the pencil just turns and nothing happens. Or my favorite the plastic cracks and they just end up totally devastated. Not worth the money, even if it's only a few dollars.
Well, these are bulk and super cheap so I should have expected them to be bad. They are. They barely sharpen anything and they break sooooo easily. Good thing there were so many, I used these in my classroom.