Proterra’s™ patent pending M-Lock technology from Oaks ensures a stable structure, even in a true vertical installation. This engineered retaining wall incorporates a reversible split/smooth texture for increased design options, as well as false joints on the smooth surface for added patterning and aesthetic appeal. We even included built-in cutting guides for half-block and 45° corners. The coping-step unit is stocked in colours as an attractive, stand-alone system.