Key takeaways
- Price. Mount-It! trays cost a fraction of high-end articulating systems, which can run several hundred dollars.
- No-drill option. The clamp-on design is genuinely useful for renters, rented office furniture and desks you do not want to damage.
- Frees up desk surface. Pulling keyboard and mouse off the desk top gives more room for papers and pushes monitors to a better viewing distance.
- Slide-away storage. Both types slide under the desk when not in use.
Mount-It! under-desk keyboard trays are solid value for people who want to lower their keyboard and mouse a few inches below desk height without paying premium ergonomic-brand prices, but which one you buy matters: the clamp-on models suit renters and solid desks with a clean edge, while the track-mounted articulating models give better ergonomics but need screws in the underside of the desk and enough depth to hide the rail.
Mount-It! is a US brand known mainly for monitor arms, TV mounts and desk accessories, and its keyboard trays sit at the budget-to-midrange end of the market. Here is what to expect, how the two main designs compare, and how to make sure one fits your desk.
Mount-It! Under Desk Keyboard Tray with Wrist Rest, 15in Slide-Out, Black
Included for 'Mount-It Under Desk Keyboard Tray Review: Clamp-On vs Track Models, Desk Fit and Limits' because the listing specifies 15in Slide-Out and Black, details this guide uses to compare options.
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Mount-It! Under Desk Keyboard Tray with Wrist Rest, Tilt and Swivel, Black
Included for 'Mount-It Under Desk Keyboard Tray Review: Clamp-On vs Track Models, Desk Fit and Limits' because the listing specifies Tilt and Swivel and Black, details this guide uses to compare options.
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Mount-It! Keyboard Tray Under Desk, 30" (36" Including Clamps) Extra-Wide Pull Out Drawer, No-Drill C-Clamp Mount, Fits Desks 0"–1.77" Thick, Holds 11 lbs, Black
Included for 'Mount-It Under Desk Keyboard Tray Review: Clamp-On vs Track Models, Desk Fit and Limits' because the listing specifies 30" (36" Including Clamps) Extra-Wide Pull Out Drawer and No-Drill C-Clamp Mount, details this guide uses to compare options.
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Mount-It! 24” Clamp-On Under Desk Keyboard Tray, Slide-Out Keyboard Drawer for Desk, Ergonomic Pull-Out Platform with Smooth Gliding Tracks, No-Drill C-Clamp Mount, Under Desk Keyboard Holder
Included for 'Mount-It Under Desk Keyboard Tray Review: Clamp-On vs Track Models, Desk Fit and Limits' because the listing specifies Slide-Out Keyboard Drawer for Desk and Ergonomic Pull-Out Platform with Smooth Gliding Tracks, details this guide uses to compare options.
View on AmazonThe two main Mount-It! tray designs
| Feature | Clamp-on tray | Track-mounted articulating tray |
|---|---|---|
| Installation | C-clamps grip the desk edge, no drilling | Rail screwed to desk underside |
| Typical tray width | About 25-27 in | About 25-28 in, often with a mouse extension |
| Height adjustment | Limited, mostly fixed drop below desk | Several inches above and below desk height |
| Tilt | Little or none on basic models | Negative and positive tilt |
| Swivel | No | Usually yes |
| Slides in and out | Yes, on drawer slides | Yes, along the track |
| Desk depth needed | About 20 in or more | Track length plus a few inches, often 20-24 in |
| Typical price | usually $50-$100 | usually $100-$200 |
Why lower the keyboard at all
A standard desk is about 29-30 in high. For most seated adults, comfortable keyboard height, with elbows at roughly 90-100 degrees and shoulders relaxed, is lower than that.
| User height | Ideal keyboard height (seated) | Drop needed from a 29.5 in desk |
|---|---|---|
| 5 ft 2 in | About 23-24 in | 5.5-6.5 in |
| 5 ft 6 in | About 24.5-25.5 in | 4-5 in |
| 5 ft 10 in | About 26-27 in | 2.5-3.5 in |
| 6 ft 2 in | About 27.5-28.5 in | 1-2 in |
Shorter users gain the most. If you only need 1-2 in, raising your chair and adding a footrest may be cheaper than a tray.
Strengths
- Price. Mount-It! trays cost a fraction of high-end articulating systems, which can run several hundred dollars.
- No-drill option. The clamp-on design is genuinely useful for renters, rented office furniture and desks you do not want to damage.
- Frees up desk surface. Pulling keyboard and mouse off the desk top gives more room for papers and pushes monitors to a better viewing distance.
- Slide-away storage. Both types slide under the desk when not in use.
Weaknesses and limits
Bounce
Every under-desk tray has some flex because it hangs from one point. Budget trays bounce more when typing hard, particularly at the front edge and when extended fully. Articulating models with a lock knob reduce this when tightened, but they will not feel as rigid as the desk itself.
Knee clearance
A tray with a mechanism hanging 2-3 in below the desk can hit your thighs if you are tall or use a high chair. Measure from floor to the underside of the desk, then subtract the mechanism thickness. You want at least 1-2 in between the bottom of the tray and the top of your thighs.
Mouse space
A 25-27 in platform fits a full-size keyboard with a mouse beside it, but just barely. Users with a wide keyboard plus a large mouse pad may want a model with a mouse extension.
Desk compatibility
Clamp-on trays need a desk edge without a deep apron, drawer or crossbar in the way, and a top thickness within the clamp range. Track models need a solid underside; thin honeycomb-core tops and glass tops cannot hold screws safely.
Fit checklist before you buy
- Measure desk top thickness; most clamps cover roughly 0.5-2 in, but confirm against the specific model.
- Measure open underside depth from the front edge back to any crossbar or modesty panel.
- Check for drawers, aprons or frame rails that block the clamp or track.
- Measure floor to desk underside and compare with your seated thigh height.
- Check combined keyboard and mouse width against the tray platform.
Installation notes
Clamp-on models install in about 15-20 minutes with no tools beyond those supplied. Track models take 30-60 minutes; mark screw holes with the track in place, drill small pilot holes, and use screws short enough not to go through the top. Most standard desk tops are around 0.75-1 in thick, so stick to the supplied wood screws and do not swap in longer ones.
Who each version suits
| Your situation | Better choice |
|---|---|
| Renter or desk you cannot drill | Clamp-on tray |
| Typing all day, wrist or shoulder strain | Articulating track tray with negative tilt |
| Standing desk user | Articulating track tray, since it also rises above desk level |
| Shallow desk under 20 in | Neither; consider a deeper desk or a keyboard platform that sits on top |
| Glass or honeycomb top | Clamp-on only, and only if the edge is solid |
Verdict
A Mount-It! under-desk keyboard tray is a practical, affordable way to bring your keyboard to elbow height. Choose the clamp-on version if you cannot drill and just need a fixed drop, and the articulating track version if you type for hours or use a standing desk. Accept some bounce as the trade-off for the price, measure your desk before ordering, and it should make a noticeable difference to shoulder and wrist comfort.
