An indexer is used on or in combination with a sheet bending brake to cut or bend a piece of sheet metal at a predetermined location without having to make pre-measurements and marks. The indexer comprises a scale and a rotable shaft having a handle. A first bending arm with a gauge and opposed second and third bending arms are connected to the shaft. Second and third arms each have a stop that positions the sheet metal to make a cut or bend at the predetermined location. An example of a method of using the indexer is also discussed.