The Bar-End ATV Mirror features bar-end mounting that will work with most ATVs. The bar-end mounting feature offers the ability to mount the mirror quickly and easily into the handlebar, while keeping the mirror out of the way, and free from interfering with hand movement. The insertion knob on The mirror is 5/8 of an inch in diameter, and the mirror head will sit 3-1/2 inches away from the handlebar. The overall length of the mirror is 10 inches. The mirror head was designed using a "tear-drop" shape measuring 6-1/4 inches long by 3-3/4 inches high (at its largest point). The viewing surface measures 5-1/2 inches long by three inches high. Installation of the mirror is easy.