Steel material; pear shaped.3.308 in. W 3.738 in. Lg 0.780 in. Thk, w/a unthd hole 1.745 in. Diameter located 1.242 in. Bottom edge to c of hole w/one keyway 0.250 in. W 0.148 in. Depth, w/one protuding stud located at top of item 0.878 in. Diameter 0.952 in. Lg 0.625 in. Diameter of tip 0.680 in. Lg