Detent hinging allows for added clearance in tight conditions and reduces width for bike storage or transfer Patented aerodynamic design with anodized aluminum housing Unique variable height/width multi-position mounting system CNC-machined from 6061 T-6 billet aluminum Automotive-quality convex mirror glass Stainless steel hardware Universal 7/8" O.D. steel and aluminum handlebar internal adapter Made in the U.S.A.. MIRROR ARROW BAR END