This trailer single axle leaf spring hanger kit comes with everything you need to attach your double eye leaf springs to your trailer. In this kit you will receive two weld on front hangers and two weld on rear hangers designed to be used with a 1 3/4" wide spring. This hanger kit also includes four spring shackles that have a center hole to center hole measurement of 3 1/8" and (6) leaf spring mounting bolts that are 9/16" diameter and 3" long. Over time existing leaf spring mounting hardware can become corroded or damaged. This trailer suspension kit includes the required components to weld all new hardware to your trailers frame to re-mount your leaf springs. This leaf spring kit allows you to allow build out your suspension system on a trailer project you may be working on. This kit features all raw steel hardware, which can be painted or coated after installation. This kit can be used on both boat trailers and utility trailers, but does require welding.