I think about 50 of these post holes were used to support the fence around the observation deck on the Hoover Dam which Poorboy sold last week on TFF. Poorboy bought them three years ago but just used a couple of them to take to court to prove to the judge that he wasn't dumber than a post hole. All the others are left overs from the project to build a Mexican/American border fence. Poorboy got them at a U.S. Gov't. surplus auction cause they decided they no longer needed them & he was the highest bidder. At any rate, I can recommend dealing with Poorboy. From watching his posts elsewhere, I know for a fact that he wouldn't pack sand up your post hole!