Card (or Tablet) Weaving has been around since the eighth century BCE. Schacht Weaving Cards keep the warp threads in order and create the shed for weaving. The cards are turned to raise and lower the warp threads. The colors of the warp threads in the four holes, along with how the cards are turned, combine to create stunning patterns. Schacht Weaving Cards have labelled holes, colored edges to keep the cards in order, are printed on high quality card stock and are die-cut for accuracy and smoothness. Includes 24 cards and directions.