I've never seen a more poorly designed installation.  It's a stool with 4 legs yet they still managed to make the instructions vague and misleading.  Instructions give the parts one label but the parts are labeled differently.  When screwing the cross piece into the legs, one side immediately caused the end of the crosspiece to split and break.  The other side did not break but the screw didn't actually reach into the leg so it was useless.  That was just the first step!  Save yourself some trouble and don't buy this.