The Revolutionary Tree Staking System designed by Landscape Maintenance Contractors: One piece cross brace for 2, 3 and 4 stake systems, 1" profile, Adjustable, Insures the stake is placed outside of rootball, Material: steel or aluminum, Powder coated in black or forest green, Less labor than traditional wood staking, Ideal for high wind areas and urban environments (street trees). Please visit our website to see our complete line of products, and to see and download our architectural drawings and written specs.