UMI Performance 15-24 Ford F-150 3/4in Extended Length Leaf Spring Pin KitUMI's leaf spring pin kit includes (4) custom extended length 4140 CrMo locating pins. These pins provide a precision way to center the leaf spring when using lowering systems or pinion angle shims. Factory pins often don't have enough length to do the job. 100% Made in USA. 1 2" 20 thread. 4. 25" total length. 0. 850" Pin length. 3 4" Pin Diameter Extended length head for use with pinion angle shims and lowering kits Includes Grade 8 hardware Tough