The Best Monitor Arms and Desk Mounts

The gas spring is the entire reason to buy this one. You set the tension once to match your monitor's weight, and then you're done. Nudge the screen up and it stays up. Come back a year later and it's still exactly where you left it. Coil-spring arms sag as the spring fatigues, and you end up hunting for a hex key every few months. Nothing about the LX asks for that kind of upkeep.

It goes high enough for almost any desk-and-chair combination. You get 13 inches of lift, which puts the screen up to 17.3 inches above your desk surface. If you're tall, if your desk sits low, or if you move between sitting and standing, that range matters more than you'd guess. There's a full 360 degrees of rotation too, so flipping to portrait for a long document or a wall of code takes about a second.

It fits whatever desk you already own. The two-piece clamp grabs edges from 0.4 to 2.4 inches thick, which covers most home desks, office desks and standing desks. The grommet mount is included, so if your desk already has a cable hole you can mount through it without buying an accessory. VESA 75x75mm and 100x100mm are both supported, and that's the pattern on the overwhelming majority of monitors sold.

Reviewers keep landing on this arm, and they've been doing it for years. The LX has been the reference point in this category for close to two decades. Published lab work backs up why: one review site's accelerometer measurements put screen movement during typing at roughly a third of a millimeter, the steadiest result in its group. Owner feedback runs the same direction — it holds still, and it keeps holding still.

Flaws but not dealbreakers

It costs several times what a basic arm does. There's no getting around that. If you're mounting a small second screen you barely touch, the extra money buys you very little. The case for spending it is daily use over many years — an arm you reposition every morning, or one you'd rather never think about again. If that's not you, the budget pick below does the core job.

The 25-pound ceiling rules out a lot of big monitors. Plenty of 32-inch panels and most heavy curved ultrawides land above it. You can physically bolt a heavier screen on, but you'll fight the spring, and published reviews have reported drift when the arm is pushed to its limit. Check your monitor's weight without its stand before ordering, and leave yourself headroom.

Cable routing is tidy, not invisible. Cables clip along the outside of the arm rather than disappearing into a sealed internal channel. It looks fine in practice. But it isn't the fully concealed run that a few competing arms manage, so if a spotless desk photo is the goal, plan on adding your own sleeve.

The LX carries a 10-year warranty from Ergotron.

This is the only arm here built for genuinely heavy screens. The rated range runs from 20 to 42 pounds, and it covers displays up to 49 inches diagonal. That takes in essentially every ultrawide currently sold, plus the large-format 4K panels that make lighter arms droop. Published reviews report it holding a 37-pound ultrawide steady, a load the standard LX couldn't manage for long at its own stated limit.

The VESA support goes wider than usual. Along with the standard 75x75mm and 100x100mm patterns, it handles 200x100mm and 200x200mm, which is what some larger displays use. Ergotron also sells a bracket adaptor kit for patterns beyond those. If you've been squinting at the back of a big monitor wondering whether anything fits it, this is the arm most likely to.

You still get the same feel underneath. It's a gas spring, so there's nothing to re-tighten as the months pass. There's 11.5 inches of lift, the screen rises up to 17.8 inches above the desktop, and you get 360 degrees of rotation and 75 degrees of tilt. The clamp works on edges from 0.4 to 2.6 inches thick, and the grommet mount comes in the box.

It can grow into a bigger setup. Ergotron sells dual and triple monitor kits that attach to the same arm, so a single heavy screen today can become a multi-screen workstation later without starting over. The low-profile clamp also tucks into tight spaces, which helps if your desk backs onto a wall or a cubicle panel.

Flaws but not dealbreakers

It's overkill, and overpriced, for a normal monitor. If your screen is under 25 pounds, you're paying a substantial premium for capacity you'll never touch. Worse, the spring has a 20-pound floor, so a light monitor won't sit properly on it at all. Buy this only when the numbers on your monitor's spec sheet actually require it.

Samsung's 49-inch Odyssey G9 needs an extra part. Because of that screen's extreme curve, you need Ergotron's separate heavy-duty tilt pivot accessory, or the bundled version that ships with the pivot included. If that's your monitor, budget for the accessory or buy the bundle from the start — otherwise you'll be waiting on a second delivery.

It's a big piece of hardware. The arm itself weighs around 17 pounds, and it takes up noticeably more room behind your desk than the standard LX. On a shallow desk, or one pushed flush against a wall, that bulk is something you'll notice.

The HX carries a 10-year warranty from Ergotron.

You get the gas spring benefit without the premium outlay. Most inexpensive arms use coil tension, which means periodic re-tightening forever. This one doesn't. The rated range runs from 6.6 to 26.4 pounds across screens from 22 to 35 inches, so it comfortably covers a 27-inch 4K panel or a lighter 34-inch ultrawide — sizes that push several pricier arms to their limit.

The mounting hardware is unusually accommodating. The C-clamp works on desks up to 3.54 inches thick, which is wider than most competitors manage, and grommet mounting handles holes from 0.39 to 1.97 inches. Cable management runs inside the arm rather than clipping to the outside. There's also a USB hub built into the base, which is a genuinely handy place for a phone cable.

The motion range covers everything you'd actually use. You get 13.5 inches of upright lift, tilt from +85 to -30 degrees, 90 degrees of swivel in each direction, and full 360-degree rotation for portrait mode. The arm is longer than average, which helps if you have a deep desk and want the screen pushed further back than a standard arm allows.

Flaws but not dealbreakers

The VESA plate is oversized, and that trips people up. The whole plate measures 118x118mm. If your monitor's mounting holes sit inside a recessed pocket on the back panel, the plate won't seat flush, and you'll need longer screws or spacers to make it work. Owners run into this often enough that it's worth checking the back of your monitor before you order.

It doesn't feel like an Ergotron, and it doesn't pretend to. The metal is lighter gauge and the motion is a little coarser — more of a shove than a glide. It'll hold your screen where you put it, which is the part that matters. But if you adjust your monitor constantly, the refinement gap is something you'll feel every day.

The spring tunes itself, which is genuinely different. Every other arm here asks you to set tension for your monitor's weight. This one adapts on its own as the arm extends, using Humanscale's weight-compensating spring design. Swap in a heavier screen and you don't touch anything. For a shared desk where different people bring different monitors, that removes a recurring support headache.

Positioning it takes almost no effort. The arm moves with a damped, even feel rather than the slight snap you get from a gas spring at the ends of its travel. Smart Stop keeps the arm from banging down into the desk surface, which matters more than it sounds like it should if your desk has a finish you care about.

It's designed around real office life. The rated range covers single monitors from 6 to 28 pounds, and it works on conventional desks and sit-stand workstations alike. The quick-release joints snap together during setup, so installation is fast and doesn't require a drawer of tools. That combination is why corporate ergonomics programs keep specifying it.

Flaws but not dealbreakers

The price is aimed at procurement departments, not home offices. It costs a large multiple of what the top pick does, and the practical gap between them is narrower than the price gap. Unless you're outfitting shared desks or you have a specific ergonomics requirement to meet, the money is hard to justify.

You'll wait for it. Lead times run roughly two weeks, so this isn't the arm to order the night before you rearrange your desk. Plan around it.

Set-and-forget users won't notice what they paid for. Automatic weight compensation earns its keep when the arm moves often or the monitor changes. If you mount one screen, get it level, and never touch it again, you've bought an elegant solution to a problem you don't have.

Stacking wins when desk width is the constraint. Side-by-side dual arms spread across your whole desk and force you to swivel your head all day. Going vertical keeps both screens in front of you and leaves the flanks of the desk free. Developers and traders tend to land here: a wide landscape panel up top, a portrait terminal below, or the reverse.

These are two proper LX arms, not a compromised pair. Each gets 13 inches of independent lift, and the top screen can rise as high as 31.7 inches above the desktop. Each arm handles up to 40 inches and 22 pounds, with 360-degree rotation and 75 degrees of tilt. You can also position the screens side by side if you change your mind later.

Everything you need ships in the box. That includes both arms and extensions, the 23-inch pole, a heavy-duty clamp for edges from 0.63 to 2.6 inches, the grommet plate and hardware, and two pole collars. If you later want a third or fourth display, Ergotron sells an arm-and-collar kit that adds to the same pole.

Flaws but not dealbreakers

It's the most expensive item in this guide. That's a lot to spend on desk hardware, though it's still less than buying two separate top-pick arms — and it gives you a cleaner desk with one mounting point instead of two.

The 22-pound per-screen limit is lower than the single LX's. Heavier 32-inch gaming panels won't qualify. Check both monitors, not just the bigger one, and remember the pole has to carry the pair.

Getting the stack to look right takes patience. Two screens directly above each other make any misalignment obvious in a way that side-by-side placement forgives. Expect to spend real time squaring things up during setup.

The LX Vertical Stacking arm carries a 10-year warranty from Ergotron.