The special shape in combination with wavy glue recesses and longitudinal ribs on the side give the DOMINO stones a firm hold. For absolutely rotationally secure connections and maximum stability. And this with significantly faster processing. The first DOMINO hole is made using stop pins are simply determined and milled to size. The workpieces to be joined are immediately fixed exactly and flat against the edge. The DOMINO system also tolerates smaller inaccuracies at the other DOMINO holes.