Metal swing sets are very durable as long as the legs are anchored in concrete. This is for safety and prevents the swing set from tipping over. Kettler offers a superior unit and you can’t beat the price for something that will last for a long time. Many consumers have written great reviews about this line and for good reason.  For example, safe for play, easy to build, and the design is wonderful. Made as sturdy, strong, powder coated steel frame finished in primary bright colors.  The German maker is widely recognized as a leader in metal fabricating.  KETTLER® Swing set is well known for its uncompromising quality & safety by the leading German Testing Institute.