The Rockwell 6S safety razor is able to be fine tuned to your desired “setting” by swapping or flipping over the base plate. There are many razors out there that have similar technologies, but this razor seems to have a pretty hardcore following. As far as it being an adjustable safety razor, I think the jury is still out.
I picked up my Rockwell 6S from the Shave Mercantile here: https://ift.tt/QUEaTA7
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