The special shape in combination with expanding glue pockets and longitudinal grooves gives the dowels a secure grip. For absolutely twist-proof connections and maximum stability. Added to this is significantly faster processing: The first dowel hole is aligned with extreme ease and routed accurately using flip stops. It immediately secures the work-pieces that are to be joined so that they are exact and flush with the edge. The DOMINO system even tolerates smaller imprecisions in the other dowel holes.DOMINO 4 x 20, 5 x 30, 6 x 40, 8 x 40, 8 x 50, 10 x 50 mm and DOMINO router cutters for sizes 4, 5, 6, 8 and 10