Fantastic file. But I'm a dummy, and applied too much pressure with my thumb, and broke it near the top where it's clear glass. I was too used to metal files. This thing is not meant to flex. Mea culpa. Anyway, I taped up the handle with green electrical tape to give it a grip, and it's even stronger... doesn't matter that it looks like a prison shiv now.With no pressure at all, this thing files really smoothly and precisely. If you let your nails get long, you can press down a bit and start filing off chunks, so be careful too, and look down often.