1、Heavy Duty Shackle Link: Trailer spring shackle straps are manufactured from 3/16in thick heavy duty steel for high wear and rust resistance, ensuring long lifespan in various harsh environments. 2、Precise Size: With a length of 3‑1/8in from center of hole to center of hole, and overall dimensions of 4in in length and 1‑1/4in in width, these shackle straps are precisely designed. The bolt hole diameter of 9/16in ensures an excellent fit for your trailer needs. 3、Compatibility: These straps are perfect for linking a double eye spring to a single axle trailer's rear hanger or an equalizer of a multi axle trailer. They demonstrate a versatile compatibility suitable for a variety of trailer configurations. 4、Promoting Balanced Loads: The shackle link connection enables movement, ensuring an evenly distributed load between the axles. This feature significantly enhances the stability and safety of transport. 5、Reliable Performance: Strong, rugged, and built to last, these shackle straps provide dependable service for your towing needs. Whether for a single or multi axle trailer, to deliver consistent performance.