We are so proud of the corner design in this log system, we included it in the name. Better than a traditional saddle notch, the interlocking corners in the 8"x8" round log offer a design unsurpassed in strength and "sealability." The logs are locked together with a large single tongue and groove, and a foam gasket and wood-binding sealer are applied between each course before the logs are fastened together with lag screws. The full round log is planed smooth on all sides, giving that true "western" feel to any design.