and two chains of pure gold, made of braided cord work; and attach these chains to the settings.
Directions are here given concerning the ephod, which was the outmost garment of the high priest. Linen ephods were worn by the inferior priests, Sa1 22:18. Samuel wore one when he was a child (Sa1 2:18), and David when he danced before the ark (Sa2 6:14); but this which the high priest only wore was called a golden ephod, because there was a great deal of gold woven into it.
Commenting on Exodus 28:6-14
And thou shall make the breastplate of judgment,.... Called a "breastplate", because worn upon the breast of the high priest; and a breastplate "of judgment", because it was to put him in mind that he should do justice and judgment in the execution of his office, and that he should have at heart the judgment of the people of Israel; and in difficult cases should...
And two chains [of] pure gold at the ends; [of] wreathen work shalt thou make them, and fasten the wreathen chains to the ouches. (g) Of the bosses.