"GEN-Y HITCH The BOSS TORSION-FLEX 2.5"" Shank 21K Drop 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, fully adjustable, and versatile drop 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 drop 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, the built-to-last shank 21K drop hitch features heavy-duty rubber TORSION-FLEX cords, tongue-weight scale, and has a drop/raise range of 12"". Designed for 1.5"" or smaller lunette rings. Includes dual ball (2"" and 2-5/16"") and pintle lock. Meets SAE-J684 weight-testing requirements. 500-mile average break-in period for hitch. Mfrs. 5-year warranty on rubber components; mfrs. limited lifetime warranty on rest of components. Towing Capacity: 21,000 lbs. Tongue Weight: 2,400 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"