I found these tool parts from all the watch tools I have but can't seem to find what tool they are used in. I'm guessing a screw driver type looking handle with an end that screws in/out so these bits can be taken in and out. Does anyone recommend these? I went on a watch tool buying spree a few years ago and barely used them but have a bunch of tools. I even have many Dumont tweezers. Anyway, here is a picture.