Absolutely NOT. It's an old wifes' tale. It does nothing unless of course in the processs it corrects a misaligned broadhead a little. It does nothing to line the two up. I just got to be a smart alec, If you line up your blades with your "VEINS" you may bleed out.LOL[8D] If however you line you blades up with you "VANES" it's ok but not needed.