Country Manor Wall Units Provincial Stone Curbstone Keystone Standard Units Compact Units Victorian Wall Stone Garden Wall Intermediate Units Corners & Caps Retaining Wall Accessories Celtik Wall Keystone Garden Wall Photo Gallery | Product Colors | Specifications | Installation Guidelines Keystone Garden Wall is lightweight and requires no special tools to install. Its unique design enables you to build straight, curved or terraced walls to 3' feet high. With the natural look of quarried stone, Garden Wall offers a unique blend of timeless beauty and durability. For more info on Keystone, Click here to visit the Keystone Website