I have several sets that I believe are ameristep but could be another brand. I wait until Cabelas or Sportsmansguide put them on sale and buy them then. You can get them for $30 for 15ft and 40 for 20ft. My lil bro buys the ameristep rapid rails and they seem to work in difficult trees because they dont have to be straight. They do slightly give when first set up so I prefer the ladder type. Anything is better than those pesky screw-in type.