RockyMounts Locking TailPipe 4 Includes locks that enable you to lock the rack to car and bikes to rack Fits both 2 inch or 1-1/4 inch hitch receivers (Class II receivers or higher) Arms fold down when not in use for compact storage and parking and mast tilts 60 degrees from upright position allowing rear access to your trunk, hatch, or tailgate Smooth rubber cradles hold your bike firmly in place and protects the bike frame and easy to use straps keep your bikes safe and secure Anti-sway feature limits lateral movement reducing contact while carrying multiple bikes