Matthew Poole and continuators on Exodus 27:2

2 And thou shalt make the horns of it upon the four corners thereof: his horns shall be of the same : and thou shalt overlay it with brass .

Which were elevated above the body of the Altar, in form either of pyramids or spires, or rather of horns, as the word signifies: nor is there any necessity of departing from the proper signification. These were not onely for ornament, but for use also, either to keep things put upon it from falling, or that beasts to be offered might be bound to them. See Psal. 118. 27.

Of the same piece with the altar, for its use required strength.

With plates of brass of competent thickness, both above the wood and under it, that the fire might not take hold of the wood.

Marginal references: See Num. 16. 38.