'Axe' in the Bible

Should an axe brag against him who chops with it? Should a saw exalt itself above him who saws with it? As if a rod should lift those who lift it up, or as if a staff should lift up someone who is not wood.

The blacksmith takes an axe, works in the coals, fashions it with hammers, and works it with his strong arm. He is hungry, and his strength fails; he drinks no water, and is faint.