1 Kings 10:16

Verse 16. Shields. Hebrew tsinnu is rather indeterminate, denoting something sharp or pointed; “a dart,” and so forth Calmet.—Par. spears. Some of the shields were made with a point, projecting from the middle, ( Bible.) with which the enemy might be wounded. Menochius.—These arms were used when the king went to the temple, and were reposited in the arsenal, at his return. Calmet. 14:28.

A shekel is about 10 grams or about 0.32 Troy ounces, so 600 shekels is about 6 kilograms or 13.2 pounds or 192 Troy ounces.