1、Rugged Construction: Constructed with heavy duty rolled steel material, ensuring high hardness, rust resistance, and long lifespan to withstand harsh environments. 2、Improved Tie Plate Design: Specifically designed for 3in round axles, the 7in long, 1/2in diameter U bolts come with 2 tie plates for 1‑3/4in or 2in leaf springs. 3、Enhanced Load Capacity: The U bolts feature an improved tie plate design for superior force distribution and increased load bearing capability, ensuring stability while towing a trailer. 4、High Compatibility: Replacement for 5200lbs to 7000lbs 3 inch round axles leaf spring. Ideal for renovation and replacement projects, ensuring stability while towing a trailer. 5、Reliable and Versatile: Upgraded performance and professional design, this U bolt kit provides exceptional performance and reliability for various trailer applications.