The special shape in combination with expanding glue pockets and longitudinal grooves gives the tenon a secure grip, to give a twist-proof connection with maximum stability. Added to this is significantly faster processing: The first tenon hole is aligned with extreme ease and routed accurately using flip stops. It immediately secures the workpieces that are to be joined so that they are exact and flush with the edge. Tenons are 36mm long, ideal for joining two bases to a centre panel on 19mm thick T cupboard structures (centre panel joint).