The Drive Towing Mirror twin pack is an excellent purchase for those that want maximum visibility when carrying an extra load. Each mirror has a support arm for extra stability and to decrease vibration. The convex mirror provides an increased field of vision which is essential when towing a load that blocks your rear vision. The mirror is easy to install and doesn't obstruct your existing mirror like some products can. Make sure you can navigate the roads safely with the Drive Towing Mirrors.