You touch a metallic object of Medium size or smaller or a section of metal no more than 5 feet in any dimension and form it into any shape that suits your purpose. So, for example, you could shape a large shield into a weapon, idol, or coffer, or make a small passage through an iron door, as long as the door is less than 5 feet thick. You could also shape a metal door or its frame to seal the door shut. The object you create can have up to two hinges and a latch, but finer mechanical detail isn't possible.