I used pipe hangers I got from ACE hardware. I put the half circle end on the light Bar and attached the plate to the hanger. They are not visible like those plate hangers everyone uses. They look like a "P" but open so you can put it on the light bar. it's not fastened to the light bar, only the plate. The end of the hanger is mounted hole end up. I think they might be for 3/4 inch pipe or maybe 1/2." There only about $1.00 each or a couple dollars for a pair.