The Cycle Star 901 handlebar mirror from Busch&Müller either plugs into the end of your handlebar, or wraps around the bar, whichever you prefer. The 5.5 " gently curved arm is best for positioning the mirror well to the side or high above the handlebar. The mirror comes complete with the hardware pictured below. A 55mm, slightly convex lense provides exceptional optics and a wide view of the road behind you. Dual ball-pivots allow full adjustment to get the angle just right!