Features:Adapter which allows a WanderWay carrier to go from 2 to 3 bikes in capacity,Attaches an additional bike rail in-between the two original mountings on the WanderWay platform,Adjustable wheel attachments with pump buckle straps,Lockable frame holder arm for securing the frame,Rubber coated jaws hold frame securely and a lockable AcuTight torque limiting knob prevents over or under tightening,Covered by Thule's 5 year warranty.