Shrink wrap them together, put them in a tube, put wads of paper on the sides of them on both ends to keep them from shifting side to side, make the tube about 2" longer than the bars and put wads of paper on each end to keep them from moving back and forth...
If you can shake the package and feel the load shift, they're not packed with enough paper wadding... You should be able to shake the package and not hear or feel them shift in the packaging...
If they have room to shift, they can accelerate and break through the packaging... You want to trap them from moving during shipping so they don't 'punch out' of the packaging....
