arrangement of elements is explicitly described one embodiment of this invention is a manufactured or prefabricated typically concrete pole base with an adjustable connection enabling use of the base to support and stabilize light poles signs posts and other monopoles having a range of different sizes of attachment plates or other structures other embodiments may not be manufactured or prefabricated remote from the location where used or may have numerous other differences the figures depict an exemplary embodiment of the invention in which a generally cylindrical base 10 has a concrete body 11 having a cylindrical wall 12 a top 14 a bottom 16 and two recesses 18 and 20 recesses 18 and 20 have rectangular vertical planar portions 22 that intersect the cylindrical wall 12 at vertical arises 24 and 26 the tops and bottoms of which transition to the cylindrical wall 12 along sloping upper transitions 28 and lower transitions 30 as depicted in fig1 alternatively recesses 18 and 20 can extend all the way from upper transitions 28 through the bottom 16 of the body as depicted in fig1 a notch may be cast in the side of body 11 to indicate u201c grade u201d i e the.