Potenzo Stone by Keystone presents a rustic charm with its four different sized units. The four different sized units provide a high degree of random layout due to variations from width dimensions. Potenzo Stone allows construction of small freestanding walls, parapet walls, pilasters and columns in addition to retaining walls due to the ability to create 90° corners with two units. Stones range from 10 to 30 pounds in weight. Potenzo Stone's random and rugged feel adds character to every project.