Peco ST-51 Left Hand Crossing Set Track This new N gauge crossing represents an upgrade from the original ST-7 crossing. Being ‘handed’ means that more realistic formations, junctions and crossovers can be created and as they are Setrack items, they are fitted with metal rail joiners and fully compatible with the existing geometry of the range For the time being the ST-7 will continue to be available alongside these new crossings, but will eventually be renumbered and modified, and move over to the PECO Streamline Universal Code 80 range. To help differentiate the right-hand from the left-hand, each item is marked with the part number on the base. See Modelzone item PCST50 for R/H Crossing. Item sold seperately.