They appear similar to (large-hole) pegboard hooks, with a few modifications:
The loop end looks like it might have a rubberized coating on it, to soften the impact of utensils clanging against it. Such could be added to standard hooks, as I've seen (and used) the rubberized coating sold at retail stores as a liquid, in a pint or quart can. It's been years since I've used any, but it worked. Simply dip the loops into it, hang up and let them dry.
The horizontal prong of the hook looks like it has a detent formed into it. That could be more difficult to duplicate, but not impossible. Some careful tweaking with a Dremel tool, using an appropriate tip.