Goture Rod Mast Guying Spike

A lot of folks use the Goture Tenkara rods as cheap, light, and portable antenna masts. The bottom cap of the rod is rounded and it can slip around when guying. I wanted to create something that could be left on all the time but still gave a little grip on soft ground. I have the 7.2m version, not sure if all of the lengths have the same diameter threading on the bottom.