Anodized black billet clamps from Moto Armor
They measure 3/4" inch wide with a 1.75", 1.875", or 2" Diameter.
The package includes 4 Black billet clamps, 4 black stainless bolts .5", 4 black stainless bolts 2.25", 4 black stainless washers. 
Multiple ways to mount what ever you need with the use of two threaded holes.
Precise fitment without any vibrations.