This grommet is used on the side of the foosball table, and holds the bar in place. The outside part is three pieces that are assembled with bearings; and the inside part is a single piece. They screw together on the side of the table.I made this to replace broken pieces on my Harvard foosball table. When removing the original grommet be careful not to lose the bearings (ask me how I know). Assemble the outside pieces with the bearings, and then join the inside and outside parts through the hole on the side of the table. See the pics to get a better idea.