With the Handy Stone® II Retaining System, it's easy to build a variety of retaining wall projects - including those with curves and corners. No mortar or concrete footings are required. Instead, units are simply placed on a sand leveling pad. Rear lips on Handy Stone® II units help to resist forces from retained soil and provide correct alignment. The solid concrete units are virtually maintenance free and are an environmentally safe alternative to treated timbers or railroad ties.