2-piece billet aluminum bracket.Used to convert from the standard bar-end mirrors to a clamp-on handlebar style.The stock RH series mirrors can be reused or most custom mirrors can be installed.Also great for use in virtually all custom applications with a 1" (25.4mm) diameter clamping area.Allows above or below handlebar mirror mounting.Black painted to match OEM controls.With 11/32" (8.7mm) mounting hole.