This replacement raw steel weld on front spring hanger is perfect for Boat trailers or utility trailers using 9/16 inch Leaf Spring Bolts. This front hanger welds to the frame of your trailer to attach your double eye springs. This hanger can also be used on tandem axle trailers as the front or the rear hanger. The springs that are used with this hanger are 1 ¾ inch wide springs.