The REESE Towpower 7012900 Solo Magnetic Trailer Hitch Alignment System Backup Guide makes it easy to get everything in line when backing your vehicle up to your trailer. This brightly colored trailer hitch accessory is designed to make lining up and connecting your tow vehicle and trailer easier, especially when doing it alone. The hitch alignment system features a magnetic base for convenient placement and rods that adjust up to 42 inches. Bright optic yellow indicator balls at the top of each rod make it clear to see when you're lined up just right. This trailer hitch accessory is brought to you by REESE, the most recognized brand in towing and trailering since 1952. Make the journey as enjoyable as the destination.