Keystone's Stonegate combines an elegant weathered stone appearance with almost endless design possibilities. This versatile retaining wall system allows for the easy creation of gravity retaining walls up to 3-feet in height, freestanding walls, and outdoor living elements such as kitchens, fireplaces, fire pits, benches and more. Stonegate is a smooth-faced versatile wall system that allows for the easy creation of gravity walls up to 3-feet in height, freestanding walls and outdoor living elements such as outdoor kitchens, fireplaces, fire pits and benches. Stonegate is offered in both a tumbled and Contemporary finish to meet the needs of your next project.