KTC Fully Adjustable Single Monitor Arm for 23.8"–42" Screens, Up to 19.8 lbs
Designed for Bigger Screens
Create a cleaner, more flexible workspace with an adjustable monitor arm for large, curved, and ultrawide displays.
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Premium Aluminum Alloy Build
Die-cast aluminum, CNC-machined components, and a powder-coated finish provide durable support with a sleek look. -
Wide Compatibility
Fits 23.8"–42" monitors, including curved and ultrawide models, within the supported weight and VESA limits. -
Fully Adjustable
Adjust the height from 9.7–19.9 inches (246–506mm) and extend up to 19.7 inches (500mm). Tilt, swivel, and rotate 360° to find your preferred viewing position. -
Dual Installation Options
Includes a C-clamp for desks 0.4–2.6 inches thick and a grommet mount for holes 0.4–1.2 inches wide. All installation tools and hardware are included. -
Universal VESA Compatibility
Supports 75 × 75mm and 100 × 100mm VESA patterns and monitors weighing 5.5–19.8 lbs (2.5–9kg). Integrated cable management keeps wires organized.
Product Parameters
Product Parameters
Model Number: S091
Supported Screen Sizes: 23.8" – 42" (diagonal)
Weight Capacity: 2.5 – 9 kg (5.5 – 19.8 lbs)
VESA Compatibility: 75×75mm, 100×100mm
Monitor Types: Flat, Curved, Ultrawide
Mounting Methods: Desk Clamp / Grommet Mount
Desk Thickness (Clamp): 10 – 65mm (0.4" – 2.6")
Grommet Hole Diameter: 10 – 30mm (0.4" – 1.2")
Height Adjustment: 246 – 506mm (9.7" – 19.9") from desk surface
Forward/Backward Reach: 0 – 500mm (0 – 19.7")
Arm Extension from Pole: Up to 500mm
Main Arm Body: High-strength aluminum alloy die-casting
Structural Plates: Steel stamping
Joint Components: POM (polyoxymethylene) wear-resistant material
Spring System: Mechanical spring
Product Net Weight: 2.38 kg (5.25 lbs) — includes 0.097 kg accessory kit
Gross Weight (Packaged): 3.15 kg (6.94 lbs)
Package Dimensions: 460 × 260 × 135mm (18.1" × 10.2" × 5.3")
In the Box
In the Box
Monitor Arm x 1
Desk Clamp Base x 1
Grommet Mount Hardware x 1 set
M4x10 Thumb Screws (tool-free VESA) x 4
M4x15 Flat-Head Screws x 4
Washers x 4
Screwdriver x 1
Quick Start Guide x 1
Warranty Card x 1
Free & Fast Shipping
Free & Fast Shipping
Free standard shipping to the contiguous U.S. & Canada＆AU on orders over $100 USD. Full terms in our Shipping Policy.
30-Day Price Protection
30-Day Price Protection
Find a lower price? Send KTC support a screenshot to request a price difference refund
30-Day Free Returns
30-Day Free Returns
Free returns for defective or incorrect items within 30 days. See return policy.
1-Year Warranty
1-Year Warranty
A 1-year limited warranty covers manufacturing defects, excluding accidental damage, misuse, and unauthorized modifications.
User Manual
KTC Fully Adjustable Single Monitor Arm for 23.8"–42" Screens, Up to 19.8 lbs
Sale price$49.99 USD
Regular price$69.99 USD
FAQ
Will this monitor arm fit my monitor? How do I check VESA compatibility?
The S091 supports both VESA 75×75mm and 100×100mm mounting patterns, which covers over 95% of monitors on the market. To check your monitor:
- Look at the back of your monitor for 4 screw holes in a square pattern
- Measure the distance between holes horizontally and vertically (75mm ≈ 3 inches, 100mm ≈ 4 inches)
- If your monitor doesn't have VESA holes (rare), you may need a VESA adapter plate (sold separately)
S091 Compatibility: 75×75mm and 100×100mm — works with virtually all standard monitors from 24" to 42"
What's the maximum weight my monitor can be?
The S091 supports monitors weighing 2.5–9 kg (5.5–19.8 lbs) — this is the weight of the monitor without its original stand.
To check your monitor's weight:
- Search your monitor model + "weight without stand" on the manufacturer's website
- Most 24"–32" monitors weigh 4–7 kg (9–15 lbs) — well within range
- For curved monitors, add a 2–3 kg (4.4–6.6 lbs) buffer since the center of gravity shifts forward
Pro Tip: If your monitor is close to the 9 kg limit (like some 34"–42" ultrawides), ensure the arm is properly tension-adjusted using the included hex key.
Will the desk clamp fit my desk? How thick can my desk be?
The S091 clamp fits desk thicknesses 10–65mm (0.4"–2.6"), which covers most standard desks:
- Standard IKEA desks: typically 25–40mm
- Solid wood desks: typically 30–50mm
- Thick executive desks: up to 65mm
Before purchasing, check:
- Measure your desk thickness at the rear edge where you plan to mount
- Ensure your desk edge is flat (not beveled or rounded more than 2.5mm)
- Particleboard/MDF desks are compatible — the clamp includes protective pads
Not recommended for: Glass desks (risk of shattering under clamp pressure)
Should I use the desk clamp or the grommet mount?
Both mounting methods are included in the box — choose based on your situation:
| Scenario | Recommended Mount |
| Renting / may move later | Desk Clamp — easy to remove, no drilling |
| Desk has pre-drilled cable hole | Grommet Mount — cleaner look |
| Want maximum flexibility to reposition | Desk Clamp |
| Want permanent, polished appearance | Grommet Mount |
| Desk edge is blocked or beveled | Grommet Mount(requires drilling) |
Grommet installation: Drill a 10–30mm (0.4"–1.2") diameter hole, ideally 60–80mm from the desk edge.
Will this work with my curved or ultrawide monitor?
Yes! The S091 supports 23.8" to 42" monitors including curved and ultrawide displays, as long as:
- The monitor weighs under 9 kg (19.8 lbs) without the stand
- It has a standard VESA pattern (75×75 or 100×100mm)
For curved monitors: The center of gravity shifts forward, so double-check your monitor's actual weight. A 34" curved monitor typically weighs 6–8 kg — well within the S091's capacity.
How difficult is installation? Do I need special tools?
Installation takes 15–20 minutes with basic tools:
What's included in the box:
- Screwdriver
- M4×10 thumb screws ×4 (for tool-free VESA attachment)
- M4×15 flat-head screws ×4
- Washers ×4
- Quick Start Guide
- Warranty card
You may also need:
- A hex key (for tension adjustment)
- A drill (only if using grommet mount and no existing hole)
Tool-free VESA: The thumb screws allow you to attach/detach your monitor without a screwdriver — great for future monitor upgrades!
Is the arm durable? What's the expected lifespan?
The S091 is built with premium materials for long-term reliability:
- Mechanical spring system — more durable than gas springs (which can lose pressure over time)
- POM wear-resistant joints — smooth adjustment without degradation
- CNC-machined components — precision fit prevents wobbling
- Aluminum alloy + steel construction — powder-coated for corrosion resistance
- Tested for 20,000 adjustment cycles (estimated 5–10 years of daily use)