This Ridge Ryder Towing Mirror Clamp is specifically designed to assist drivers when towing a caravan from their vehicle. Installation is easy with the mirror simply clamping onto your already present side-view mirror and requiring no use of tools like some competitor's. Another great benefit to this mirror is the fact that it doesn't obstruct or replace your existing mirror, so you're given a double-wide view of the side of your vehicle and caravan. This item is sold individually and not only makes driving safe for you and all your passengers, but also provides a much needed heightened safety element for the other drivers on the road as well.