Exodus 27:17

All the pillars round about the court shall be filleted with
silver
This is observed, because only mention is made before of the pillars that were on the south and north sides of the court, as filleted with silver; but inasmuch as those at both ends, east and west, were to be so likewise, this is added:

their hooks [shall be of] silver,
and their sockets of brass; no notice having been taken of the hooks to the pillars at both ends, though they were as necessary there as elsewhere, and must be supposed, and though the sockets are mentioned, yet not their metal, and therefore are in general included here.