Give your walls and steps a clean, finished look by ordering Colonial Cap capstones and stone retaining wall caps from Nicolock Paving Stones. Capped stone walls not only look better, but they’re also more durable as the retaining wall caps help protect the wall stones underneath from sun, rain, snow and the elements. Use Colonial Cap stones on retaining walls, freestanding walls and steps. Give any outdoor stone project a finished look with Colonial Cap retaining wall block caps from Nicolock Paving Stones.