This is a new offering here at the shop. Instead of the usual coatings like Duracoat or Ceracoat (which will wear), this is a chemically blackened stainless buckle with matching black stainless screws that offer more durability.
These are shown on a walnut brown Rhodesian™ and can be fitted to most of the 2-point and Rhodesian™ offerings that I make, including the biothane slings.