What grommet hole diameter is needed for a grommet-mount monitor arm?

Most grommet-mount monitor arms require a desk grommet hole of 1.25"–2.5" in diameter. The standard commercial desk grommet hole is 2"–3" round. If your desk has a smaller grommet or cable port, measure carefully before purchasing a grommet-mount arm — some arms with a narrower grommet post fit a 1.5" opening. If your desk has no grommet hole, a clamp-mount arm is the no-drill solution. Drilling a custom grommet hole in an existing desk is straightforward with a 2.5" hole saw if needed. OfficeFurniture2go.com carries both grommet-mount and clamp-mount monitor arms — call 1-800-460-0858 to determine the right mount type for your desk.