I have a used set of Lippert Solid Steps model 645497. I bought these to put on my trailer but where trailer is stored there isn’t enough room for these to open up, otherwise they would be installed on my unit. There is only one issue, where the bottom step got hit and a small crack has formed where the bull nose hits the extrusion. However they are still completely functional, and 1/4 the price. Cash only first $100 takes them.