The Pendle Tow Bar Racks are quick and easy to install and remove. Simply fit the mounting block of your choice to your tow bar, and the bike rack arms simply slot into the sockets of the block. There is also the option to purchase the Behind the Ball 4 Bike rack with arms that are 15 inches higher than the standard version for extra clearance whilst towing. A truly solid, sturdy, top quality bike rack.