Yes that's correct Wenbin. The Towing Kit w/ Ball Mount and Trailer Wiring for Stealth Hitches Hidden Rack Receiver # SH79FR is just the towing kit for the Stealth Hitches Hidden Rack Receiver # SH84FR, so put together as a kit they are the Stealth Hitches Hidden Trailer Hitch Receiver w/ Towing Kit # SH84FRT. view full answer...