Ground cover spikes

My book shows the spikes with a washer welded to the top but after realizing I could just heat the 24" long 3/8" diameter rebar at 3" I could bend it over and I could use it without the extra cost and no welding. Air cooling is best, if you quench it the end will breake off from hardening when you strike it with a hammer. Paint the end neon orange so it's easy to find later.