The cross arms with the old pins that held the M-4321 B insulators. These arms are attached to the pole with two 5/8" thru-bolts rather than one in later construction. The bolts were spaced 6" apart and there was a curved plate that they passed through on the opposite side of the pole acting as a strain and anti- split plate. The braces for these arms were wood without any metal on the ends ane were 5' long.