Steve Rogers' shield is his primary weapon. The most well-known of his shields is a disc shaped object with a five pointed star design in its center, within blue, red, and white concentric circles. This shield is composed of a unique alloy of Vibranium and hardened steel and is, therefore, practically indestructible. It is as much an offensive weapon as a defensive one for Captain America. Cap uses it against his enemies, mainly, by throwing it at them and can perform mind-bogglingly impossible tricks with it. it was created back in WWII (made out of a Vibrainium-Steel Alloy) as his main weapon against enemies like the Red Skull.