The most secure way to mount the beach umbrella into the sand or ground is to use the sand anchor. The sand anchor has a large over-size thumbscrew conveniently locks against any inserted pole 1.5-inches or less in diameter. It is light-weight, safe, and will easily fit into a beach bag. The continuous spiral blade pulls the auger downward when turned clockwise. It is long enough to reach through loose sand to secure beach umbrellas that will withstand very windy conditions. Turning it in the opposite direction will release it from the sand.