Exacto Blade Broadheads

This concept came to me when thinking of improvised weaponry in a post-apoc environment. Every hunting and archery shop will be picked clean rather quickly, so I designed an effective arrowhead made from materials that will likely not be in high demand. And to any naysayers who claim the materials wouldn't hold up I say two things: Current hunting broadheads have moving parts flimsier than this, and people made their first arrowheads out of wood and rocks. These are fine. Obviously I managed to make these, I just can't make any money off them so what good is it not to share them?