An instrument for measuring large trunk bone breadths, namely shoulders, hips, and thoracic widths, this iodized aluminum tool uses the sliding-branch principle to allow a closer contact between fingers and bone breadths. To aid visualization this tool has a window with contrasting white numbers on a dark background and a yellow indicator line. It has two 10 cm silver-colored movable guides to aid in measuring anterior-posterior chest breadth, and one of its branches has an Allen-type screw to allow calibration. Included is the Allen wrench. Resolution to 1.0 mm.
