Before you decide how to repair the couch springs, you should inspect the existing spring base to assess the damage and decide how you will repair it. Here, you can see my couch with the sagging ...

The kit includes: All commercial grade items, including four no-sag couch springs, 12 upholstery spring clips, 20 feet of seat spring stay wire, 20 stay wire clips, 32 screws, and step-by-step ...