I made this to kinda work like the ez hook if you have ever seen that. It is used to help tie hooks and you can also use it to cover the hook when your done fishing to keep from snagging on things. As of right now it only works with more of the catfish hooks rather than the bass hooks but i am working on one that will work with the bigger bass hooks. For assembly all you need is a piece of filament and 2 (5mm by 2mm magnets). Feel free to remix i am not sure on how to make a snap fit as i am still learning how to 3d model so i do apologize for that. You don't have to use the magnets but if you want it to stay on you will need them. This model does have some tight tolerances on certain things like the pivot point or joint and where the magnets go. Modeled after the HOOK-EZE Fishing Knot Tying Tool if you use a rubber band through the whole it makes it easier to twist.