A grommet is an eyelet placed in a hole in a sheet or panel to protect or insulate a rope or cable passed through it or to prevent the sheet or panel from being torn. Generally, ones used for banners are made of brass to prevent rusting. On a long banner, they may be positioned along the edges every 18 to 24 inches depending upon banner length.
X-Banner Stands require grommets, Banner Tabs, or Wedge Clamps on each of four banner corners. L-Banner Stands and retractors do not require grommets.