Humanscale 100 Combo Keyboard Tray - Design Your Own

The Humanscale 100 Combo Keyboard Tray - Design Your Own is easily configured to meet specific needs

Effective 11/15/2021, Humanscale requires a signature upon delivery.

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Shop standing desks and ergonomic accessories by UPLIFT Desk

Better ergonomics is just around the bend, of the keyboard tray, that is. Enjoy a tray that houses natural or curved keyboards with the Humanscale 100 Combo Keyboard Tray, which allows you to engage in negative tilt keying for more comfort.

Working within your Neutral Reach Zone is crucial to your health; sit too long in the wrong position and you'll see what we mean.

When you need the keyboard brought closer to you, the customizable Humanscale 100 Combo Keyboard Tray is your go-to desk accessory to assist you in better typing.

The tray attaches to most desks and can be customized with accessories that meet your unique workstation needs.


  • Easily configured to meet specific needs
  • Platform is made of phenolic - an ultra-strong, remarkably thin 1/4" composite that's nontoxic, durable, and easy to clean
  • Versatile two-way design can be flipped to accommodate natural-shaped and rectangular keyboards, with or without wrist rest
  • Design supports natural or wave ergonomic keyboards, works with any of the mouse platform options and will fit most desks
  • 15 year warranty


Mechanisms 9 adjustable arms available
Track lengths 11" - 27" for varying desk depths
Mousing surface 13 clip-on and swivel options
Platform dimensions 20.5" W x 10.48" D
13.24" D at deepest point
Warranty 15 years

Promotional Item


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FREE UPLIFT Single Monitor Arm

Mount a monitor weighing between 4.5 lbs - 17.5 lbs, and adjust the height, depth or lateral position with easy fingertip adjustment.

UPLIFT Single Monitor Arm


The Humanscale 100 Combo Keyboard Tray is only available in Black.


Humanscale Keyboard Mechanisms

6G mechanism

Humanscale's newest dial-a-tilt mechanism that instantly adjusts the platform's tilt without the need to lock or loosen any knobs or levers and slimmer than the 5G. The 6G mechanism is available in black or white.

Height adjustment 7": 1.75" above track to 5.25" below track
Track length Comes standard with 22" track

5GSM mechanism for limited-depth desks

This mechanism goes 4" farther underneath a desk surface, getting a keyboard tray stored out of the way on a shorter track, perfect for desks with limited depth or small spaces. This mechanism is available in black or platinum.

Height adjustment 4": 0.5" above track to 3.5" below track
Track length Comes standard with 18" track

Lateral Slider

All Humanscale mechanisms pivot 360 degrees from the point where it is mounted to the track. Some users have a need for additional side-to-side adjustability. The lateral slider provides for eight extra inches of movement from right to left. This is a useful feature for someone at a large workstation that requires them to type facing different angles or monitors.

Humanscale Lateral Slider

Mouse Platform

Clip Mouse - Mousing Platform

The clip mouse platform is the only mouse platform that allows the user total adjustment control in all three dimensions- height, depth, forward/back and tilt, allowing it to be adjusted precisely the way you need it. It also easily snaps onto either side of the tray for left or right use, and it's available in two sizes and different height ranges.

Note: The high clip has an extra one inch height for additional adjustment and usability and is the most popular accessory we sell.

90 8.5'' diameter
90H 8.5'' diameter high
91 10'' diameter
91H 10'' diameter high
90H90H 8.5'' diameter high - Dual platforms for left and right
91H91H 10'' diameter high - Dual platforms for left and right
Humanscale Clip Mouse Platform

Swivel Mouse - Mousing Platform

The swivel mouse mounts underneath either the left or right front corner of the platform. It swivels out from underneath the keyboard platform easily and tucks out of the way when not in use. This mouse platform is available in right, left and dual configurations. The main difference between the clip mouse and swivel mouse is the adjustability. The swivel platform stays on the same tilt or angle as the keyboard tray; the clip mouse angle can be adjusted independently.

11R 8'' swivel right
11L 8'' swivel left
11D 8'' swivel dual - Dual platforms for left and right
12R 10'' swivel right
12L 10'' swivel left
12D 10'' swivel dual - Dual platforms for left and right
Humanscale Swivel Mouse Platform

M2 Mouse - Mousing Platform

The M2 offers all the advantages of the swivel mouse, but it is slightly larger and offers a uniquely shaped platform. This lets a user bring the mousing surface closer to their body for a lower risk mousing position.

81R M2 right
81L M2 left
81D M2 dual - Dual platforms for left and right
Humanscale M2 Mouse Platform

Palm Support

The Humanscale 100 Combo Keyboard Tray can be ordered with palm rests for additional support while typing and mousing. Humanscale palm supports are available in black only.

19'' palm rest [F, G, S] Foam, gel or slim with synthetic leather cover
Humanscale Palm Rests

Track Length

The track mounts to the underside of your work surface. It directs and supports the Humanscale mechanism and keyboard tray as it slides forward and back. Standard length on most mechanisms is 21 5/8 inches. That length ensures that the keyboard tray can be completely stowed under your desk when not in use. Some mechanisms come standard with a shorter or longer track. Consult each description for that information, but all systems can be ordered with any track length.


Mouse Pad

The Humanscale 300 Curved Keyboard Tray can be ordered with a mouse pad to fit any of the available mousing platforms.

8.5'' swivel platforms MPGEL8 8.5'' gel mouse pad
10'' swivel platforms MPGEL10 10'' gel mouse pad
90 or 90H clip platforms CMPGEL8 8.5'' gel mouse pad
91 or 91H clip platforms CMPGEL 10'' gel mouse pad
8'' - 8.5'' mouse platforms HSMP12TIPS 8'' ergo tips mouse pad
10'' mouse platforms MSMP12TIPS10 9'' ergo tips mouse bad

Second Mouse Pad

A second mouse pad can be ordered with the Humanscale 100 tray for configurations utilizing two mouse platforms.

3 Reviews Hide Reviews Show Reviews

  • 5
    This is da bomb!

    Posted by Clutterbug on Aug 1st 2019

    I am so happy I bought this tray and I also purchased the screw on, round tray for the mouse, which I so love BECAUSE IT HAS A RIM ON IT and my $100 ergonomic mouse can no longer take unbidden dives to the floor and break. I love that the mouse tray slides under the keyboard for when I tuck my keyboard in at the end of the day. I love how adjustable this is. You can angle it, raise it, make it oh just so comfortable. Between this and the mechanism that goes under the desk I feel I paid a lot of money, but when I received these items and started using them, enjoying the extra space on my desktop because the keyboard goes under the desk, I feel it was money well spent. Only one small plastic stopper bracket broke in the installation process, but doesn't affect the operation of the keyboard at all. What are you waiting for? BUY IT!!!

  • 5
    Fantastic Tray and Mouse Pad

    Posted by Raymond Sung on Jul 16th 2010

    The keyboard tray tucks neatly underneath my work desk, has good forward tilt and the mousing surface is very comfortable and roomy!

  • 5
    Well built tray

    Posted by Keith on Jun 25th 2009

    This is an excellent keyboard tray, and the buying options letting me pick and choose the components was a great feature.

    On the positive side, this was relatively easy to install (although does require laying on your back under the desk with a drill and screwdriver, but that would be the case with any keyboard tray) and definitely gives the impression of a tray that will last for many years. I installed it on a brand new, custom made executive desk, and am not disappointed. It is easy to adjust, and lets me qickly move the keyboard to a comfortable height.

    On the negative, there were some shipping delays and it took a couple of weeks to arrive. When it did arrive, the mouse tray was pre-attached to the keyboard tray, but they put it on upside down -- however, that only took a couple of minutes to fix, so not really a big deal. The package included almost double the parts needed, I think because they have enough screws for every add-on you might get. That made it a little harder that it could have been to figure out which screws were the ones I needed, but again not really a big deal.

    All told, I'm pleased with the purchase and would buy it again.

Warranty Policy

Visit Humanscale for the warranty policy for this particular product.

Return Policy

Humanscale products cannot be returned.

Your Price
Ships Free (US 48)
Ships in 3-4 weeks

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