ODD BROADHEADS

[wildcat hunter]

I was given 6 arrows with broadheads, I'm curious about the broadheads. They are 4 pieces of metal, 2 are the "blades and they have a "rounded cap ( goes over the shaft, one on each side) welded to them. These rounded caps have Small lifted "blades on them. At first look I thought they were inserts but no, they are a perminate part of the broadhead. Sorry, I have no camera for pictures. Any ideas on the history of these.