We have some beautiful spike plants which we think are Agaves and Yucca aloifolia Variegata (Spanish bayonet) we think. But check the pictures out. They are in great condition and free to a good home provided you come and take them out yourself. Only reason for removing them is so the grandkids don't impale themselves or take an eye out. They are around our pool.
There is 4 or so of the Yucca aloifolias and a few of the agaves. No idea how deep the roots are.