We installed this around our concrete walkway to hold in the black rubber mulch we installed. In heavy rains the mulch would sometimes get washed on the sidewalk, the edging worked great, we installed it about 5 inches in the ground all the way against the walkway with about 3 inches above the walkway. Worked like a charm no more washed out mulch in heavy downpours plus keeps grass from creeping under the sidewalk into the mulch areas as well. We installed about 80 feet of edging and plan to use this along the flower beds as well, black powder coat looks great.