Used these in some really deep sand last week to get a 4 Runner towing and off-road trailer turned around after it got stuck. Used them under the back wheels because they were sinking so bad. The damage to the boards was from wheel spin. It wouldn’t have been covered even on the $300+ boards. They do have some signs of stress and may crack in the future but we made 15+ runs on the boards and drove them deep into the sand.