Not sure what else to call them. Just little cone shaped bits of finished wood.
The base of each piece is wider than the corresponding elements on the original prop, so each segment has a greater degree of taper. Plus, the hole in these wood cones is a bit off-center. So there will be a lot of sanding at hand. Not the type of sanding I want to be doing in an open garage in full view of the passing neighbors, either.
Well, personally, the "type" of metal (quality, etc) isn't super important, it's more about the look & feel of it. I don't know if you remember my GoNY Club-Axe project? For the axe-head, I used a piece of low-grade steel that had previously been a blanking-panel for a server rack (a "perk" of IT work). I cut the basic shape out with an angle-grinder, & finished with a rasp & belt sander.
The blade on this tomahawk looks like a triangle with a small rectangle-hole in the center. It also looks like there is a metal section encircling the handle where the blade is attached? For that, I'd try a short length of steel pipe, slotted, so it would slide over the axe-head. Then I'd use something like 'Devcon Metal Patch & Fill', to close any gaps between the metal surfaces.
Anyway, awesome project, love that flick. :thumbsup
And FWIW, I also lack tools & experience working with metal...