וּמִצְחַ֥ת נְחֹ֖שֶׁת עַל־רַגְלָ֑יו וְכִיד֥וֹן נְחֹ֖שֶׁת בֵּ֥ין כְּתֵפָֽיו׃
And he had greaves of brass upon his legs, and a javelin of brass between his shoulders.
Read kabbalistic (mystical) interpretation of I Samuel 17:6: and classical mystical sources.