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 2 1/2" and six leaf spring mounting bolts that are 9/16" diameter and 3" long.