This is actually a dentists tool. They need to be accurate in their work,much in the same way fly tyers (sometimes) need to. I use this when preparing wings for streamers and wet flies, and in particular when tying Catskill-style. The tool is not expensive and you can probably get one from your dentist. Choose from either the used or the mint condition category.
This is my bench or work station, if you like. Personally I do not like to mix fly tying with the word work. This is what it ususally looks like at the start of a tying session. It gets much worse during the day. What you see is my beloved Dyna-King vise,the Matarelli whip-finish and what I think is the best bobbin available, TMC Ceramic. I have used the same vise since 1994. I have tried to be unfaithful, but I always return.