that includes bottom and top plate members 740 760 the plurality of pin clamps 500 and first and second fixation post members 780 base member 720 has a bore 722 therethrough and a longitudinal axis l 4 a longitudinal axis of first and second plate members 740 760 is preferably parallel with longitudinal axis l 4 of base member 720 but may be angled with respect to longitudinal axis l 4 of base member 720 first and second plate members 740 760 each have a threaded vertical bore 790 extending through outwardly and inwardly facing surfaces 750 770 thereof first and second plate members 740 760 further have a longitudinal recess 775 in the inwardly facing surfaces 770 thereof longitudinal recess 775 is shaped to receive a portion of outer circumference surface 506 of the plurality of pin clamps 500 in order to couple and partially house the plurality of pin clamps 500 with respect to first and second plate members 740 760 fixation post members 780 have a head portion 782 and a threaded shaft portion 784 threaded shaft portion 784 of fixation post members is received and threaded into vertical bore 790 of first and second plate member 740 760 upon threading of fixation post members into vertical bores 790 of first and second plate members 740 760 a bottom surface 786 of head portion 782 of fixation post members 780 presses against outwardly facing surface 750 of one of the first and second plate members 740 760 and cases the inwardly facing surfaces 770 of the first and second plate members 740 760 to move closer to one another such that the plurality of pin clamps 500 become.