Aluminum alloy; 6.375 in. O/a lg, 4.750 in. W, 6.000 in. O/a h; 1st end rd and slotted, 4.000 in. 1st end od, 0.100 in. Slot w, 0.925 in. Slot depth; 2nd u-shape, 2.313 in. Distance between fork; 4.875 in. Fork o/a w; two cams located on outer periphery, one cam 3.000 in. By 2.125 in. 2nd cam 2.250 in. By 1.375