It's German-made mirror designed while its German designer was in a hospital bed recovering from a motorcycle accident and, obviously beneficiently, wanted to save the rest of us from his situation. ("Wie kann ich helfen?") 

Super easy to mount and use. Light, tough, adjustable. Useful most of the time and near essential for tours and city riding when you wanna know who or what is behind you.

After a couple years the mirror might dull a bit, but you can bring it back to life with a brisk but short scrub with either a homemade compound consisting of baking soda and water or, absent those ingredients, toothpaste—dein wahl!

It's the best handlebar mounted bike mirror available. We've test them all. Mounts with a hose-clip to almost any handlebar.