Constructed of steel plate molded into a recycled rubber base. Two molded-in carrying handles allow for easy movement and placement of the Zephyr Portable Sign Stand. Easy to use — Simply release the lever and raise the mast to lock the Zephyr Sign Stand into the upright position. No further adjustments are necessary. The plastic corner pocket at the bottom of the sign allows for quick and easy mounting of sign to the Zephyr stand. Just insert the corner pocket and press down automatically locking the sign into place. To remove, simply lift the release lever. The big rubber base (28" x 17.5") is skid-resistant and is stable enough to remain in place, even in windy conditions. Zephyr "spills the wind" without the use of bulky springs.