The HitchMate Hitch Extension with Anti-Wobble Hitch Lock is designed to extend a 2 receiver hitch for bike racks and is suitable for vehicles that have spare tires on the back. This Hitch Kit includes the 2 x 2 Advantage Hitch Extension and an Advantage Anti-Wobble Hitch Lock that is designed for extra security and fits virtually all threaded 2 receivers. With the HitchMate Hitch Receiver Lock and Extension you can extend your hitch up to 11 in length to transport your bikes from place to place with ease. A threaded bolt provides the anti-wobble needed to keep your trailer or bike rack secure. The HitchMate Hitch Extension with Anti-Wobble Hitch Lock features an anti-wobble device that fits 2 receiver hitches.