The Keystone Standard Unit is not only the industry leader, it created the industry. The patented mortar less, interlocking system provides both function and design flexibility (curves, straight walls, terraces), and harmonizes beautifully with your building or landscaping site.

The Standard unit's height-to-depth ratio offers a structurally sound, engineered wall system with superior stability, durability, and strength. Keystone walls are easy to install and cost effective compared to traditional methods.

Standard Unit 8"H x 18"W x 21 1/2"D (.200 x .455 x .545 m) 105 lbs. (50 kg) Compac Unit 8"H x 18"W x 12"D (.200 x .455 x .545 m) 85 lbs (39 kg) Universal Cap A Keystone wall is not complete without the "capping touch"! Fiberglass Pins 1/2" x 5 1/4" (13 x 133 mm) Flexural Strength 128,000 psi (822 kpa) Tensil Strength 111,000 psi (758 kPa) Short Beam Shear Strength 6,400 psi (44kPa)