This 6 blade tree spade can move trees with trunks up to 5 inches in diameter. With a rootball 50" in diameter and 43" deep, the ST650 Nomad gets to the root of the problem. The dual hinged outer frame arms mean this Nomad tree spade opens up then hugs the tree to prevent damage to lower branches and to aid in positioning. More blades mean easier spading, cleaner cuts and a better rootball. The results are a cleaner, more viable transplant. For a truly moving experience, you need the Nomad ST650 tree spade.