With its proven performance and legendary strength, Diamond Pro® is one of the most-specified retaining wall systems for commercial applications. Why mess with success? Architects and engineers worldwide rely on Diamond Pro® as a system that works for them. Whether your need is for a three-foot high elevated patio or a thirty-three-foot high critical structure, it’ll work for you, too. Diamond Pro® is a classic retaining wall block with a history of performance behind it.