Andirons are the horizontal bars upon which logs are laid for burning in a fireplace. They are used in pairs and are sometimes called "firedogs" or "dog" or "dog iron" The earliest ones were forged from wrought iron.
Today andirons are quite decorative and you can find them in most any style to suit your taste or decor.
Some sources include Ebay, Etsy, 1st Dibbs, One Kings Lane, Ateriors, or your local antique market. You can find these at any price point. Love them all!