The Advantage 4 Bike Folding Prong cycle rack is suitable for bikes of most types. The arms can be easily removed and folded away for easy storage. The fixed straight bottom socket includes 2 metal loops for securing bikes and can also be used to lock bikes to the rack with the use of a cable style lock. EziGrip 150mm 250mm extensions can be used where further clearance is required (Refer page 21). Fits on both 1-7/8 #8221 and 50mm style tow balls. Complete Rack Includes: #8226 Bungy Kit #8226 Allen Key Note: Not suitable for Euro style tow bars.