Keystone's Half Century Wall offers the distinctive appearance and character of a random-pattern, natural stone wall with the strucural integrity, performance, and environmental friendliness of concrete. When combined with the original Keystone Century Wall, the three different-sized Keystone Half Century units give the appearance of classic, hand-crafted stone, yet make it fast and almost effortless to create visually stunning and heavy-duty wall structures. The Keystone Half Century is perfect for residential, commercial, industrial, and institutional applications. Keystone Half Century is also easy to install and utilizes a unique, patented fiberglass pin connection method for added structural integrity and performance. Offering a quaint, old-world appearance while providing superior strength Keystone Half Century can rise to great heights with appropriate engineering.