"GEN-Y HITCH The BOSS TORSION-FLEX 2.5"" Shank 1.7K TW 21K Hitch with Dual-Ball reduces trailer inertia transfers for a 90% smoother ride compared to a hard-connection hitch. You can also expect better gas mileage from this heavy-duty, versatile hitch. Tow vehicle and trailer track independently reducing sway and trailer bounce for better driving control and safety. An even distribution of weight on the tow vehicle and trailer also greatly increases braking control. The BOSS TORSION-FLEX hitch reduces metal fatigue to the trailer and contents caused by traditional towing. Engineered with Solidworks software from heavy-duty steel and finished with a silver-vein powder coat, the built-to-last 21K drop hitch features heavy-duty rubber Torsion-Flex cords, tongue-weight scale, and 2"" slot openings. Choose between 5"", 7.5"", and 10"" drop/raise ranges. Designed for 1.5"" or smaller lunette rings (not included). Includes dual ball (2"" and 2-5/16"") and pintle lock. Smoothest ride achieved at 1000 to 1700 lbs. tongue weight. Meets SAE-J684 weight-testing requirements. 500-mile average break-in period for hitch. Mfrs. 5-year limited warranty on rubber components; mfrs. limited lifetime warranty on rest of components. Tongue Weight: 2400 lbs. Max Towing Weight: 21,000 lbs. 90% smoother ride compared to hard-connection hitch Offers better driving control and gas mileage Reduces metal fatigue to the trailer and contents Silver-vein-powder finished, heavy-duty steel Heavy-duty rubber TORSION-FLEX cords Built-in suspension creates up to 90% smoother ride Shock absorption protects cargo from harsh bumps Includes dual ball mount and pintle lock"