Revolutionary Dual Angle System provides the versatility to make on-the-fly adjustments to the angle of the carrier to maximize loading capacity, improve aerodynamics, and make loading easier. Just pull a lever to raise it to keep tall bindings off you car’s roof and make loading equipment easier on tall vehicles. Lower it back down for better aerodynamics when carrying small loads or when not in use. Includes keys & locks. Dual opening allows access to equipment from both sides of vehicle without stretching.