Benefits Suitable for use in stone and root obstructed soil. It is designed for toughest operations. Used for loosening and aerating soil to a depth of nine inches. Prepares seed beds quickly and economically   Features When one tyne strikes a hidden object, the others continue to work at the correct depth. Spring Loaded assemblies derive their strength from heavy-duty angles, which once fixed to the immensely strong main frame cannot move or strain out of position.