Amazon Basics Gas Spring Single Monitor Arm Desk Mount, Adjustable Tension, Fits 15–27 Inch Monitors, Supports 4.4–15.4 lbs, VESA 75x75/100x100, Black

Why it's worth it

It uses a real gas spring mechanism — not the spring-tension found on most sub-$40 alternatives — which means it won't require re-tightening every few months. The 15.4 lb weight limit restricts it to monitors 24" and under, but for a secondary workstation screen, a small display, or a first-time buyer replacing a factory stand, this is remarkable value for the price.

From our review of 12 monitor arms and desk mounts, by Ben Carter, Tech Editor

What we like

• +Genuine gas spring mechanism at $23.09 — rare at this price tier
• +Supports monitors 4.4–15.4 lbs with 7-step adjustable tension
• +VESA 75x75mm and 100x100mm compatible with tilt, swivel, and 360° rotation
• +Extends up to 20.5 inches — useful reach for deeper desks

What to know

• –15.4 lb maximum weight rules out most monitors larger than 24"
• –27" maximum screen size is restrictive for anyone with a modern larger display
• –Tension adjustment instructions reference specific clockwise-turn counts — requires patience to calibrate correctly