A guide assembly comprising: a spinal rod guide comprising an upper threaded inner portion, the upper threaded inner portion configured to threadingly receive a threaded outer portion of a reduction tool; a spinal screw assembly comprising a bone screw and a spinal rod holder, the spinal rod holder comprising an intermediate threaded inner portion and a lower threaded inner portion; a fastener, the fastener configured to be threadingly received by the intermediate and lower threaded inner portions (376, 380) and to engage a surface of a spinal rod; wherein the spinal rod guide and the intermediate threaded inner portion are detachably coupled to a remainder of the spinal rod holder such that the intermediate and lower threaded inner portions (376, 380) of the spinal rod holder enable a user to thread the fastener along both the intermediate threaded inner portion and the lower threaded inner portion of the spinal rod holder in a continuous manner prior to detachment of the spinal rod guide and the intermediate threaded inner portion from the remainder of the spinal rod holder; further comprising the reduction tool, wherein the upper threaded inner portion is positioned above the intermediate threaded inner portion, and the intermediate threaded inner portion is positioned above the lower threaded inner portion, characterized in that an end of the reduction tool is configured to engage the fastener such that the threaded outer portion of the reduction tool disengages the upper threaded inner portion of the spinal rod guide prior to the fastener engaging the intermediate threaded inner portion of the spinal rod holder. a spinal rod guide comprising an upper threaded inner portion, the upper threaded inner portion configured to threadingly receive a threaded outer portion of a reduction tool; a spinal screw assembly comprising a bone screw and a spinal rod holder, the spinal rod holder comprising an intermediate threaded inner portion and a lower threaded inner portion; a fastener, the fastener configured to be threadingly received by the intermediate and lower threaded inner portions (376, 380) and to engage a surface of a spinal rod; wherein the spinal rod guide and the intermediate threaded inner portion are detachably coupled to a remainder of the spinal rod holder such that the intermediate and lower threaded inner portions (376, 380) of the spinal rod holder enable a user to thread the fastener along both the intermediate threaded inner portion and the lower threaded inner portion of the spinal rod holder in a continuous manner prior to detachment of the spinal rod guide and the intermediate threaded inner portion from the remainder of the spinal rod holder; further comprising the reduction tool, wherein the upper threaded inner portion is positioned above the intermediate threaded inner portion, and the intermediate threaded inner portion is positioned above the lower threaded inner portion, characterized in that an end of the reduction tool is configured to engage the fastener such that the threaded outer portion of the reduction tool disengages the upper threaded inner portion of the spinal rod guide prior to the fastener engaging the intermediate threaded inner portion of the spinal rod holder.