A knacks is detailed knowledge about a specific item type. It makes it possible for a character to create items of that type with some type of shaping action that they can use. A knack is an Information Object, so it can be memorized by a character, written down on paper or in a book, and teached to another character. It can also be learned by carefully studying the an item that the character wants to learn the knack of making. Items that the character doesn't have direct access to can be learned by research (knacks that don't exist in the game can not be learned through research, of course).