Safely view what or who is behind you on the trail. Required by many states for road travel, Kolpin"s ATV rear view mirror features a fully adjustable, ultra-clear 4” diameter mirror with a ball & socket swivel design. The innovative, quick attach/detach mounting base (which is interchangeable with Kolpin Rhino Grip XL #21510) accommodates 5/8” to 1” diameter tubing for positioning on ATV racks or handlebar.