I suspect a fence puller of sorts but I could be off.
There is an old saying and it goes something like this...you can give a man a fish and feed him for a day or teach him to fish and feed him for life or something along those lines so...
You have a year and a month that is all you will need and this will help you to get started on your own:
The snow chain pliers that I have seen also have a set of jaws to straighten links out and then bend them back together. Those are hog ring pliers for sure.