I'm using this for a purpose. To install a barrier beneath my fence to keep armadillos out of our yard. Since they don't dig very deep this method has proven effective in filling the gap that formed between our fence and the ground due, to years of soil erosion. Far its working well. I've noticed an attempts by them to dig in but hopefully they'll give up and find another spot.
UPDATE! Wow this idea has turned out to be one of my best ! 😄 Even our landscaping company was impressed by how simple my solution's for keeping critters from our yard. The spikes have endured through floods, snow and extreme heat without any changes, in their appearance or strength. They haven't rusted either so our soil remains safe and unaffected. No need to spend a fortune on installing a barrier along your fence when you can just place these stakes in the ground to deter digging critters.