The Ergotron WorkFit-LX Sit-Stand Desk Mount System (45-405-026) is an adjustable workstation solution designed to help users alternate between sitting and standing. Its articulated monitor and keyboard arms allow independent positioning of the screen and input devices, making it suitable for offices, home workspaces and professional environments.
Finished in polished aluminum, this system combines a monitor arm, keyboard tray, mouse tray and mounting hardware in one integrated setup. The arms extend and retract to provide flexibility when arranging your workspace, while integrated cable management helps keep cables organised.
Key Features
- Sit-stand flexibility: Provides 20 inches (50.8 cm) of height adjustment to support changes between sitting and standing positions.
- Adjustable monitor arm: Supports compatible displays weighing 7–25 lbs (3.2–11.3 kg), with tilt, pan and rotation adjustments.
- Integrated keyboard tray: Includes a keyboard platform with wrist rest for convenient typing.
- Flexible mouse placement: Includes a slide-out mouse tray that can be positioned on the left or right.
- Flexible desk mounting: Includes desk clamp and grommet mounting options for compatible desks.
Ergonomic Positioning and Workspace Flexibility
The WorkFit-LX allows the monitor and keyboard to be repositioned to suit different working postures. Its articulated arms provide a wide range of movement, helping users arrange the workstation around their desk layout and preferred viewing position.
The monitor arm extends up to 33 inches (83.8 cm), while 360-degree pan and rotation adjustments provide additional positioning flexibility. The keyboard tray and mouse platform offer dedicated spaces for everyday computer input.
Desk Compatibility and Installation
The included desk clamp attaches to a desk edge up to 2.5 inches (6.4 cm) thick. The alternative grommet mount accommodates a compatible mounting hole between 0.5 and 2.5 inches (1.3–6.4 cm) wide, with a desk thickness up to 2.25 inches (5.7 cm).
Before installation, verify desk dimensions, mounting clearance and monitor weight. Ensure that cables have sufficient length to accommodate the full range of arm movement.
Technical Specifications
| Brand | Ergotron |
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| Part Number / MPN | 45-405-026 |
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| Product Type | Sit-Stand Desk Mount System |
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| Product Family | WorkFit-LX |
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| Finish | Polished Aluminum |
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| Number of Displays Supported | 1 |
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| Maximum Recommended Display Size | 42 inches |
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| Monitor Weight Capacity | 7–25 lbs (3.2–11.3 kg) |
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| Keyboard Arm Capacity | Up to 5 lbs (2.3 kg) |
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| Height Adjustment | 20 inches (50.8 cm) |
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| Maximum Arm Extension | 33 inches (83.8 cm) |
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| Side-to-Side Movement | Up to 62 inches (157.5 cm) |
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| Monitor Tilt | 70° upward / 5° downward |
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| Monitor Pan | 360° |
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| Monitor Rotation | 360° |
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| VESA Compatibility | 75 x 75 mm and 100 x 100 mm (MIS-D); larger patterns may be supported with compatible VESA interfaces |
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| Keyboard Tray Dimensions | 18.3 x 8.9 inches (46.5 x 22.6 cm) |
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| Mouse Tray Dimensions | 8 x 8 inches (20.3 x 20.3 cm) |
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| Desk Mounting Options | Desk clamp and grommet mount |
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| Desk Clamp Compatibility | Desk edge up to 2.5 inches (6.4 cm) thick |
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| Grommet Mount Compatibility | Hole 0.5–2.5 inches (1.3–6.4 cm) wide; desk thickness up to 2.25 inches (5.7 cm) |
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| Cable Management | Integrated cable routing along the arms |
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| Warranty | 5 years |
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What Is Included?
- Monitor arm assembly
- Two arm extensions
- Keyboard arm and tray
- Slide-out mouse tray
- Mounting pole and pole collars
- Desk clamp and grommet mounting hardware
- VESA mounting components
- Wrist rest and installation hardware
DC Supplies Product Note
Before ordering, confirm your monitor's weight and VESA mounting pattern, along with your desk's thickness and available mounting space. The maximum display size is a guideline; the monitor must remain within the specified weight capacity. This system is supplied in a polished aluminum finish.
Frequently Asked Questions
What is the Ergotron WorkFit-LX 45-405-026?
It is a sit-stand desk mount system that combines an adjustable monitor arm with a keyboard tray and mouse platform.
What is the maximum monitor weight?
The monitor arm supports displays weighing between 7 and 25 lbs (3.2–11.3 kg). Check the display weight and mounting compatibility before installation.
Can the WorkFit-LX support a 42-inch monitor?
Displays up to 42 inches are within the stated size guideline, provided the monitor's weight and mounting interface meet the system's requirements.
How much height adjustment does it provide?
The system provides 20 inches (50.8 cm) of height adjustment to help users reposition the workstation between sitting and standing positions.
Does the system include a keyboard and mouse tray?
Yes. It includes a keyboard tray with wrist rest and a separate slide-out mouse tray that can be installed on either side.
What desk mounting options are included?
The system includes both a desk clamp and a grommet mounting option. Confirm your desk dimensions and mounting-hole requirements before installation.
