Charles Ellicott Commentary Exodus 26:37

"And thou shalt make for the screen five pillars of acacia, and overlay them with gold: their hooks shall be of gold: and thou shalt cast five sockets of brass for them." — Exodus 26:37 (ASV)

Five pillars. —The odd number is surprising, especially compared with the “four pillars” of the interior (Exodus 26:32), until we remember that a tent such as that described must have a pillar, or tent-pole, in the middle of its gable-end, and an equal number of supports on either side. It is, in fact, this fifth pillar which, together with the use of the word ’ohel, gives to the tent theory of Mr. Fergusson, now generally adopted, its solid basis.

Their hooks. —The hooks from which the hanging was to be suspended .

Sockets of brass. —Rather, “of bronze.” (See Note on Exodus 25:3).