The cross-section of a Domino dowel corresponds to that of three round dowels of the same drill diameter, making it extremely stable in comparison. The lateral guide ribs center the dowel perfectly in the Domino routing, ensuring precise alignment of the workpieces. Specially shaped glue pockets and longitudinal grooves distribute the glue evenly for an optimal connection. Excess glue can escape through the lateral grooves. The dowel is 100% twist-proof from the very first use. The quick identification of the correct dowel is facilitated by embossed size markings. The unique shape, combined with the swelling glue pockets and longitudinal grooves, provides the dowels with a secure hold. For absolutely twist-proof connections and maximum stability, the processing is significantly faster: the first dowel hole is very easily aligned and precisely routed using stop flaps. It instantly fixes the workpieces to be joined exactly and flush with the edge. The Domino system also tolerates minor inaccuracies in the subsequent dowel holes.