I kinda see now. I guess.

Still looks like the blades would be forced all the way open by the blunt shoulders "at" impact. I guess I need to actually hold one in my hand and tinker with it to see for myself. I am not planning to use them at all. The Slick Tricks are on my arrows for now. I was just curious from looking at all the pics I have seen as to how they were cutting the full expanse of the blades.

Thanks, LT