The frame brackets that are on the trailer are what the hangers are suppose to attach too and then the springs attached to them it gives the trailer a suspension that works as if it has independent suspension. The trailer came with the hangers but when they replaced the brackets as in the picture the gentleman has posted they attached the spring directly to the brackets on the trailer, when we got the trailer in 2006 it had the hangers on it . When I had to have the new brackets put on the trailer was because the bolts had pulled through the hanger and they found that the brackets were also elongated where the bolt holes were. Hope this makes this a little cleared