Fly Tying Hair Packer, Half Hitch, and Reverse TIe tool

I have redesigned a fly tying tool that I saw in a fly shop that someone made out of wood on a lathe. This tool can be used as a half hitch tool for finishing your flies, a hair packer when tying with deer hair, and a deer hair/ craft fur reverse tie tool.

Where I got the Idea if you want to buy one the originals from Deadfly: Also a tutorial on how to use.
https://www.youtube.com/watch?v=tYelUW0GfoU

The tool I designed has a thumb hole grip and a choice of a thicker or thinner half hi