This Wine Glasses Arm slides onto the Arm Support Bar.  It is recommended to order 3 arms to fill a 12" lenth (the length of a wine bottle.  These arms can be set close together or far apart.  This allows for loading of all kinds of glasses, including margarita and martini glasses.
This wine glass holder is best used for a wall wine rack or a floor to ceiling wine rack that is loaded only on one side.