VERSA-LOK retaining wall systems are cost effective, easy-to-install, and give you endless design options. These retaining walls are made from high-strength concrete units, dry-stacked, interlocked with pins, and set on granular leveling pads. These mortarless walls do not need frost footings. And when stabilized with geogrid soil reinforcement, VERSA-LOK walls can be built 50 feet tall and even higher.