Very nice glider. Super comfortable. Frame is all steel.  The only reason I gave it a 4 is due to the squeaking when gliding.  WD40 fix that problem, however,  needs to be sprayed on a regular basis.  Also, did adjustments in the tightening of the bolts, however still get the squeaking from time to time.  Did not expect that on a new chair and pricy enough.  Still happy with the glider.  Good construction.