1 Kings 7:30

And every base had four brasen wheels, and plates of brass,.... Flat pieces or planks of brass, on which the wheels stood, and not on the bare floor; so that these wheels seem only to serve as supporters, not to carry the laver from place to place, as is usually said; for they were not like chariot wheels, on two sides of the carriage, but set one at each square; and besides, when the lavers were placed upon them, they were fixed in a certain place, 1Ki 7:39and the four corners thereof had undersetters; or "shoulders ", or pillars, which were placed on the plates of brass the wheels were; and served with them to support the lavers when laid upon the bases, and so were of the same use as men's shoulders, to bear burdens on them:under the layer were undersetters molten; cast as, and when and where, the bases were, and the plates on which they stood; this explains the use they were of, being under the laver; these pillars stood at the four corners of the base:at the side of every addition; made of thin work, 1Ki 7:29 they stood by the side of, or within side, the sloping shelves.