Hex bar shoulder shrugs are probably the best exercise for the trapezius for
those looking to lift the maximal amount of weight as well as develop the traps
to the max. The reason why hex bar shrugs allows you to lift more than standard
barbell shrugs is because the grip is not only easier but the hole in the center
of the hex-bar automatically puts your hands and arms in the correct position to
isolate the traps without the interference where the dumbbells or barbell rub
against you. As it isolates the upper traps only, hex bar shrugs are rarely used
for anything but building the upper trapezius muscle.