I have read in several different post-apocalypse novels of the survivors using old house keys for arrow head blanks. So I decided to give it a try and see what the results would be.
Step 1: Tools to use
To mark, cut and shape the keys into arrow heads, I used a black Sharpie marker, jeweler's saw, double cut file, jeweler's bench pin and two C-clamps. Clamp the bench pin to your work table with the keyhole shape facing you.