Grimm Prop Replica Key by NBC Universal Metal prop key perfectly replicates the key worn by Nick on the Grimm television series It flips open to create a seventh of the map to locate the treasure while revealing the key. Key features a bronze finish, and it includes a 19-inch metal chain to wear as a necklace. Key measures about 1.5 inches long when closed, and its about 2.5 inches long when opened. Officially licensed product by NBC Universal