Chroma Color-Changing Knives Set by TCC MagicChroma Color Changing Knives Set includes five exquisite penknives that create a range of highly interactive and visually stunning effects with simple sleight of hand. Color Changing Knives is a cherished classic among professional magicians. These everyday penknives offer a repertoire of effects, relying on simple yet deceptive principles. With no need for complex sleight of hand, it's highly interactive and perfect for stand up performances without