sheet symetrical

Hi everybody!

Is it possible to create a symmetry of sheet metal parts?

So I explain myself I have a steel plate that has different folds and I want to make a right and a left the same but the opposite of one and the other (symmetry, mirror) How to do?

Note: I use the tool create a fold from a line (stop) on different face here to specify.

When I try, SW says that the select face does not work.

Thank you

SolidworksDrawings And Detailing