an adjustment head is provided to attach an elongated member of an artificial leg to a prosthetic leg . the adjustment head includes an upper portion and a lower portion . the upper portion provides adjustment of the elongated member in a translatory direction . the lower portion , in combination with the upper portion , provides adjustment of the elongated member in an angular direction . in making the translatory adjustment , the screw provided for this purpose will not be subject to direct breaking forces by being angled due to any angular adjustment of the elongated member , such screw always being maintained in a fixed vertical alignment .