The horns of the altar had the sacrifice fastened to them.; See Psalms 118:27. And was not Christ bound and fastened to the cross? Some have thought that the brass covering implied the Deity of Jesus covering the manhood. The horns of the altar was the place of refuge for offenders - see 1 Kings 1:50. Could anything be more expressive of the refuge in Jesus? Psalms 18:1-2.
Related Commentaries of Exodus 27:2
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.