Monitor fit
Each arm holds 7 to 20 pounds on a 75 or 100 mm VESA pattern, up to about 27 inches. Ergotron says monitors deeper than 2.5 inches may reduce capacity.
Ergotron LX Dual Side-by-Side Arm
Two LX arms on one pole for two monitors up to 27 inches and 7 to 20 pounds each, with a 10-year warranty.
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Ergotron LX Dual Side-by-Side Arm, part 45-245-026, polished aluminum, with 2-piece desk clamp and grommet mount
Ergotron LX Dual Side-by-Side Arm, part 45-245-026, polished aluminum, with 2-piece desk clamp and grommet mount
What works. What doesn't.
Desk fit
The 2-piece clamp fits a desk edge up to 2.6 inches (66 mm) thick. Part 45-245-026 also includes a grommet mount.
Adjustment
PCWorld says the arms are not long enough for two 32- or 34-inch monitors side by side, and stacking works only if one screen is under 23 inches.
Build and support
PCWorld names it the best dual-monitor arm it tested and notes the 10-year warranty.
Read the bigger picture.
Monitor mountsBuying guide
Dual monitor stands: match each arm's weight range and your desk thickness
Four dual monitor arms with each maker's VESA pattern, per-arm weight range, screen size limit and desk clamp range side by side.