Jamieson, Fausset and Brown on Jeremiah 27:2

2. bonds--by which the yoke is made fast to the neck (Jr 5:5).

yokes--literally, the carved piece of wood attached at both ends to the two yokes on the necks of a pair of oxen, so as to connect them. Here the yoke itself. The plural is used, as he was to wear one himself, and give the others to the ambassadors; (Jr 27:3; 28:10, 12) proves that the symbolical act was in this instance (though not in others, Jr 25:15) actually done (compare Is 20:2, &c.; Eze 12:3, 11, 18).