1Shackle 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. 2Premium 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. 3Double 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. 4Necessary 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. 5Package Content: The package contains 4 pieces trailer leaf spring shackle straps, providing comprehensive coverage for your trailer's suspension system. 4 xTrailerLeafSpringShackleStrap