I'm deducing these are the chrome ones from the parts catalog using the process of elimination. I imagine they'd use the same mounting hardware that's been previously provided for the black boards.
6MP95RUWAA (Left) & 6MP94RUWAA (Right)
Black Running boards (Night Edition style):
6MP94KXJAA (Right) and 6MP95KXJAA (Left) The mounting hardware is 68193128AB.
I like the all black ones, and can also appreciate how
@TexMarQue pointed out that they match the bumper pattern on top of the rear bumper. But god almighty they are expensive. They even cost more individually than the powered factory boards ($608 vs $483).
Link to the parts catalog
HERE