Double adapters have pyramid adjustment cores on both sides.
M8 adjustment screws are zinc-coated.
Under the certain demand, titanium versions can be converted to the Waterproof product with water discharge channels and A2 Stainless Steel set screws.
Hardness of pyramid section kept high to handle screw pressure. On the other hand, Hardness of the prongs has been reduced by heat treatment, it can therefore be bent back and forth.
