Optimal with their world leading designs of tree spade have a range of 11 different models from their tiny Optimal 350, which can handle a tree rootball diameter of just 36cm, to their huge truck mounted Optimal 2500, which can handle a tree rootball diameter of 2.5 metres. Optimal are certainly the innovative market leader, constantly improving their product and looking to introduce new models where they see a need. The basic tree spade consists of a sturdy circular frame around 3, 4 or 5 blades are arranged. The frame can be opened & closed to position the tree inside the machine. When the tree has been properly positioned in the centre of the machine, the blades are pressed into the soil. Once the blades have reached the bottom the tree is lifted. All these working movements are performed hydraulically.