Fingertip Movement, No Knobs
Humanscale's M2 Pro and M8 Pro are the current generation of its M-series monitor arms: the same patented Weight-Compensating Spring, so the screen moves with a fingertip and holds position without knobs, with more capacity than the arms they replace and new Quick Release joints that snap together for installation and come apart for reconfiguration. Smart Stop sets a rotation limit, and the cable runs inside the arm.
The M2 Pro is the light-monitor arm: rated for a screen from 2.3 to 10 kg, which covers a 24 to 32-inch office monitor without its stand, and 42 percent more than the M2.1 it replaces.
Eye Height, Desk Clear
Lifting the monitor off its stand does two things: it recovers the desk in front of you, and it puts the top of the screen at eye height, which is the adjustment that does most for neck posture over a day. The M2 Pro's dynamic link moves the screen up, down, forward and back in one motion, so the position changes when you do.
Quick Release joints mean the arm can be taken apart and reconfigured, or extended with links, without tools and without replacing it.
The Details
Five Things That Make It an M2 Pro
The mount, the spring, the joints, the cable route and the VESA head, with Humanscale's figures beside them.

Two-Piece Clamp Mount
A two-piece clamp mount is supplied, for the rear or side edge of a desk with a solid top and a clear underside. Bolt-through and 12, 18, 25 and 30 mm sliding desk clamps are available for thicker edges and modesty panels.

Weight-Compensating Spring
Humanscale's patented spring balances the screen so it moves with a fingertip and holds position without knobs. Rated for one monitor from 2.3 to 10 kg with all mounts, or 1.4 to 5.4 kg with a notebook holder.

Quick Release Joints
The joints snap together for installation and come apart for reconfiguration, so the arm can be taken apart or extended with links without tools and without replacing it.

Smart Stop and Cable Route
Smart Stop sets an adjustable rotation limit, and the cable runs inside the arm rather than across the desk.

Standard VESA Head
A standard 100 × 100 / 75 × 75 mm VESA plate with tilt and landscape-to-portrait rotation. VESA and mounting standards are unchanged from the M2.1, so accessories carry over.
The Numbers
- Screen Weight
- 2.3–10 kg
- Notebook Holder
- 1.4–5.4 kg
- Offset VESA
- 2.3–5.4 kg
- VESA
- 100 × 100 / 75 × 75 mm
- Mount
- Clamp (supplied)
- Warranty
- 15 years (Humanscale)
The figures are from Humanscale's weight capacity guide and product pages, and the crops are of the arm as supplied. If you are comparing arms, the capacity table in the guide linked under Specifications is the page to read; the rest of an M-series arm is the same from the M2 Pro up.
This Model
This listing is the M2 Pro single monitor arm (Humanscale code M21BTBC in black, M21BTWC in white) on the standard clamp mount with a tilt head and 100 × 100 / 75 × 75 mm VESA plate. Humanscale rates it for one monitor from 2.3 to 10 kg with all mounts; with a notebook holder or offset VESA plate, 1.4 to 5.4 kg.
Humanscale states the M2 Pro is Living Product Certified, meeting the Living Future Institute's criteria for a climate, water and energy positive product. It is supplied from Humanscale Australia's stock with Humanscale's 15-year warranty.
Why We Stock It
We stock Humanscale's M-series because it is the arm that still works in year ten: a spring, not a gas strut, machined joints, and a 15-year warranty that Humanscale actually publishes. It is also the arm that pairs with the Humanscale chairs we sell, which matters when a whole workstation is being specified.
Call 02 9640 0642 with your screen sizes and weights and we will match the arm, the mount and any links you need; we can also show you the M-series alongside the CBS and Thinking Works arms at our Pyrmont showroom, 1/209 Harris Street.
Features & Specifications
Key Features
Downloads
Dimensions
Weight capacities are Humanscale's, from its Monitor Arm Weight Capacity Guide for the M2 Pro with all mounts. Humanscale's product page does not publish reach and height figures for the M2 Pro, so none are quoted here. Chair Dinkum is a Humanscale dealer; the arms are supplied from Humanscale Australia's stock. Warranty terms are on our warranty page.
Frequently Asked Questions
Capacity and joints. Humanscale rates the M2 Pro for 2.3 to 10 kg against the M2.1's 2.3 to 7 kg, and the M2 Pro's Quick Release joints snap together for installation and come apart for reconfiguration. VESA, mounting standards and the 15-year warranty are the same, so accessories carry over. If you already own an M2.1 there is no need to replace it; if you are buying new, the M2 Pro is the current arm.
The arm ships with a standard 100 × 100 / 75 × 75 mm VESA plate, which covers most monitors. Weight is the question that matters: check the monitor's weight (without its stand) on the back panel or the maker's specification and compare it with the range on this page. Too light and the arm drifts up; too heavy and it sags. Humanscale publishes the full capacity table for every arm and mount in the guide linked under Specifications.
Not to a single M2 Pro post in a way Humanscale supports; the dual versions are built as a pair. If you think you will go to two screens, the M2 Pro dual or an M/Flex M2 Pro system, which is designed to have arms added, is the better start.
The standard two-piece clamp mount fits the rear or side edge of a desk with a solid top and a clear underside; the desk needs enough overhang for the clamp jaw. Humanscale also makes bolt-through and sliding-desk-clamp mounts (12, 18, 25 and 30 mm) for desks with a modesty panel or a thick edge. If your desk is unusual, send us a photo of the edge and we will tell you which mount you need.
Same arm, same spring, same warranty. Black disappears behind a black monitor; white with polished aluminium suits a white or light desk. Both are supplied on the standard clamp mount.
Humanscale's published warranty for this arm is 15 years against defects in materials and workmanship. Chair Dinkum is a Humanscale dealer, so a claim comes to us on 02 9640 0642 and we lodge and manage it with Humanscale. Full terms are on our warranty page, and your Australian Consumer Law rights apply in addition.

