What size grommet hole do I need to drill for a monitor arm grommet mount?

Most monitor arm grommet mounts are designed for a standard 1.5-inch (38mm) diameter grommet hole. Some arms use 3/4-inch (20mm) bolt-through grommet mounts for lighter arms. Check your specific arm's grommet hole requirement in the product specifications — it's listed as required hole diameter. Before drilling, confirm the desk has sufficient thickness at the drill location (most arms require 1–4 inches of desk thickness) and that there's no steel reinforcement or wire management underneath that would conflict with the grommet. Use a hole saw or drill press for the cleanest cut. A jagged grommet hole can cause the arm to sit unevenly. FindOfficeFurniture.com — 888-719-4960.