KEE KLAMP CROSSOVER 1-1/2|Kee Klamp's #45 crossovers are designed to give a 90° offset crossover joint. They are frequently used on safety railings, where, to reduce cost by minimizing the pipe cuts, a continuous horizontal rail is used. Pipe cannot be joined within this fitting. It may be also used to give intermediate levels on racks, etc, when horizontal ties between uprights across the section are not required.