THESE ARE VERY NICE. SWIVELS EASILY.  MY GRAND KIDS LOVE THEM.  THE ONLY THING I DON'T LIKE IS THE THE BASE IS NOT FASTENED TO THE POLE SO MOVING THEM AROUND WHILE CLEANING WIL BE TRICKY.  I DON'T QUITE UNDERSTAND WHY THEY DESIGNED IT THIS WAY.  THEY WERE VERY EASY TO ASSEMBLE AND ARE COMFORTABLE TO SIT ON.  EASY TO CLEAN.