1、Shackle Strap Specifications: The straps have a length of 3 7/8 inches, holes center to center measurement is 2 5/8 inches, holes diameter is 9/16 inches, and the thickness is 3/16 inches. 2、Premium Material: These trailer leaf spring shackle straps are made from heavy duty steel with a 3/16 inch thickness, providing impressive wear resistance as well as longevity. 3、Double Eye Leaf Springs Application: These shackle straps are designed for use with double eye leaf springs to connect the spring to the rear hanger or equalizer on the suspension system of the trailer. 4、Necessary Pivot Provision: The trailer axle shackles allow the necessary pivot of the springs by shackling them together instead of directly bolting them, ensuring an evenly distributed load between the axles. 5、Package Content: The package contains 4 pieces trailer leaf spring shackle straps, providing comprehensive coverage for your trailer's suspension system.