My home desk has two heights: sitting for morning calls and standing for the afternoon stretch. The best keyboard tray for sit stand desk setups is the one whose height range, mounting style and platform size fit your desk and your keyboard. We compared five trays by height adjustment, tilt and swivel, mounting method, stated weight capacity and warranty term, using only what each listing publishes.
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Quick picks
Best Overall Mount-It MI-7139: 13.4 in height range, gel wrist rest, lifetime warranty stated Check price on Amazon
Largest Platform VIVO MOUNT-KB34S: 33.8 by 11 in tray, 12-step height, 11 lb capacity stated Check price on Amazon
Best Clamp-On VIVO MOUNT-KB04CB: 360-degree swivel on a no-drill C-clamp, 11 lb capacity Check price on Amazon
Best Pole Mount PUTORSEN PT04KT: Fits 1.1 to 2.4 in poles, 360 rotation, cable clips included Check price on Amazon
Best with Drawer AX WABER Tray: Storage drawer, 180-degree swivel, 6.5 in height adjustment Check price on Amazon
The picks
| # | Product | Office Score | Buy |
|---|---|---|---|
| 1 | Mount-It MI-7139 | 9.7/10 | Buy on Amazon |
| 2 | VIVO MOUNT-KB34S | 9.6/10 | Buy on Amazon |
| 3 | VIVO MOUNT-KB04CB | 9.5/10 | Buy on Amazon |
| 4 | PUTORSEN PT04KT | 9.4/10 | Buy on Amazon |
| 5 | AX WABER Tray | 9.3/10 | Buy on Amazon |

Mount-It MI-7139
A full-motion under-desk tray with a stated 13.4 in height range, a gel wrist rest, 180-degree swivel and a lifetime manufacturer warranty.
Pros
- Stated 13.4 in height range runs from 4.7 in below to 8.7 in above the desk
- Lifetime manufacturer warranty with US-based product support is stated
- Tilts +15 to -13 degrees and swivels 180 degrees with a locking knob
- Gel wrist rest runs along the front edge, and the platform slides out 18 in
Cons
- Stated capacity of 4.4 lb is the lowest here
- Mounts only to wood or MDF desktops at least 0.6 in thick, not glass or metal
- Not for desks with a crossbar
- Spec table lists a 20.9 lb item weight, so check your desktop can carry it
Detailed Review
Mount-It! lists the MI-7139 as a full-motion under-desk keyboard tray with a stated 4.4 lb weight capacity. The 26.5 by 10 in platform adjusts from 4.7 in below to 8.7 in above the desktop (13.4 in), tilts +15 to -13 degrees and swivels 180 degrees, set with a locking knob. It slides out 18 in on tracks, mounts with a steel bracket and included screws to wood or MDF desktops at least 0.6 in thick, and includes a gel wrist rest. The listing states a lifetime manufacturer warranty with US-based product support.
Who it's for: a sit stand desk user who wants the keyboard to follow the desk through the widest stated range here. Who should skip it: anyone with a glass or metal desktop, a crossbar desk, or more than the stated 4.4 lb capacity.
Its Office Score of 9.7/10 comes from performance 32/35, build 22/25, value 21/25, safety 7/10 and warranty 4/5: 86 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Platform size | 26.5 by 10 in |
|---|---|
| Height range | 13.4 in, 4.7 below to 8.7 above desk |
| Tilt and swivel | +15 to -13 degrees, 180-degree swivel |
| Warranty | Lifetime manufacturer warranty |
Figures as published on the retailer listing, collected 17 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. Stated 4.4 lb weight capacity and a bolted steel under-desk bracket, so safety scores 7 of 10. A lifetime manufacturer warranty and US-based product support come standard. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 4 of 5. See How We Pick.
Moving desk, heavy load. Stay under the stated lift or weight capacity, leave slack in every cable, keep children, pets and fingers clear while the desk moves, and treat anti-collision as the maker's claim.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

VIVO MOUNT-KB34S
An extra large 33.8 by 11 in under-desk tray with a 12-step locking height adjustment, an 8.6 in swing range and a stated 11 lb capacity.
Pros
- 33.8 by 11 in platform fits a full-size keyboard and mouse with room to spare
- 12-step locking system sets the tray 2.2 to 6.5 in below the desktop
- 165-degree swing range moves the tray 8.6 in forward or back
- Alloy steel build; mounts to desktops as thin as 0.75 in
Cons
- No warranty term is stated
- Spec table lists a 10.3 lb item weight while the bullets say 9 lb
- Needs 4 in of clearance under the table for the mounting bracket
- The tray itself adds 9 lb of under-desk weight before your gear
Detailed Review
VIVO lists the MOUNT-KB34S as an extra large under-desk tray, 33.8 by 11 in, with a swinging height adjustment and a stated 11 lb capacity. The tray moves 8.6 in forward or back over a 165-degree range, and a 12-step locking system sets it 2.2 to 6.5 in below the desktop. It needs a desktop at least 0.75 in thick with 4 in of under-desk clearance. Contradiction: the bullets say the tray weighs 9 lb, while the spec table lists 10.3 lb. We trust the bullets, but ask the seller if the difference matters for your desk. No warranty term is stated.
Who it's for: someone who wants the largest platform here for a full-size keyboard plus mouse. Who should skip it: anyone short on under-desk clearance or who wants a warranty term.
Its Office Score of 9.6/10 comes from performance 29/35, build 21/25, value 20/25, safety 7/10 and warranty 0/5: 77 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Platform size | 33.8 by 11 in |
|---|---|
| Height | 2.2 to 6.5 in below desktop, 12 steps |
| Swing | 8.6 in travel, 165-degree range |
| Weight capacity | 11 lb |
Figures as published on the retailer listing, collected 17 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. Stated 11 lb weight capacity, so safety scores 7 of 10. No warranty term, so warranty scores zero. See How We Pick.
Moving desk, heavy load. Stay under the stated lift or weight capacity, leave slack in every cable, keep children, pets and fingers clear while the desk moves, and treat anti-collision as the maker's claim.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

VIVO MOUNT-KB04CB
A clamp-on tray that pivots a full 360 degrees on a single C-clamp, with a 22.8 by 9.8 in platform and a stated 11 lb capacity.
Pros
- 360-degree rotation places the tray anywhere around the clamp point
- Single C-clamp installs without drilling and fits desktops up to 2 in thick
- Rotates under the desktop for storage when not in use
- Stated 11 lb capacity on a steel clamp frame
Cons
- Needs 32 in of clearance for the full 360-degree circumference
- Not compatible with lipped or beveled desk edges
- Particle board platform is the least premium material here
- No warranty term is stated
Detailed Review
VIVO lists the MOUNT-KB04CB as a clamp-on keyboard tray with a 22.8 by 9.8 in particle board and steel platform and a stated 11 lb capacity. The tray pivots a full 360 degrees on its single C-clamp, which grips desktops up to 2 in thick without drilling, and rotates under the desktop for storage. It is not for lipped or beveled edges, and needs 32 in of clearance for the full rotation. No warranty term is stated.
Who it's for: someone who wants a no-drill tray that can swing out of the way. Who should skip it: anyone with a lipped or beveled desk edge, or who lacks 32 in of swing clearance.
Its Office Score of 9.5/10 comes from performance 28/35, build 19/25, value 20/25, safety 6/10 and warranty 0/5: 73 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Platform size | 22.8 by 9.8 in |
|---|---|
| Rotation | 360 degrees on a single C-clamp |
| Desk fit | Up to 2 in thick, flat edges only |
| Weight capacity | 11 lb |
Figures as published on the retailer listing, collected 17 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. Stated 11 lb weight capacity, so safety scores 6 of 10. No warranty term, so warranty scores zero. See How We Pick.
Moving desk, heavy load. Stay under the stated lift or weight capacity, leave slack in every cable, keep children, pets and fingers clear while the desk moves, and treat anti-collision as the maker's claim.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

PUTORSEN PT04KT
A pole-mount keyboard tray for monitor arms and stands, with two articulating arms, a 25.7 by 9.6 in platform and a stated 2.2 lb capacity.
Pros
- Clamps to poles 1.1 to 2.4 in in diameter, including monitor arms and wall mounts
- Two articulating arms offer 360-degree rotation and a 10.6 in reach
- Tilt range of +3 to -20 degrees for angle adjustment
- Cable management clips and keyboard pads are included
Cons
- Stated capacity of 2.2 lb is the lowest here
- Requires a pole or arm; it does not mount to a desktop
- No warranty term is stated
- The tray itself weighs 8.58 lb against a 2.2 lb capacity
Detailed Review
PUTORSEN lists the PT04KT as a pole-mount keyboard tray with a 25.7 by 9.6 in steel platform and a stated 2.2 lb capacity. Two articulating arms clamp to poles 1.1 to 2.4 in in diameter, with 360-degree rotation, a 10.6 in arm reach and +3 to -20 degrees of tilt. Raised edges keep the keyboard from sliding, and cable clips route cords along the arm. No warranty term is stated.
Who it's for: someone with a monitor arm or pole setup who wants the keyboard at arm level. Who should skip it: anyone without a pole, or who needs more than the stated 2.2 lb capacity.
Its Office Score of 9.4/10 comes from performance 27/35, build 18/25, value 18/25, safety 5/10 and warranty 0/5: 68 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Platform size | 25.7 by 9.6 in |
|---|---|
| Pole fit | 1.1 to 2.4 in diameter |
| Tilt | +3 to -20 degrees |
| Weight capacity | 2.2 lb |
Figures as published on the retailer listing, collected 17 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. Stated 2.2 lb weight capacity and raised platform edges, so safety scores 5 of 10. No warranty term, so warranty scores zero. See How We Pick.
Moving desk, heavy load. Stay under the stated lift or weight capacity, leave slack in every cable, keep children, pets and fingers clear while the desk moves, and treat anti-collision as the maker's claim.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

AX WABER Tray
An under-desk tray with a storage drawer, 180-degree horizontal swivel, 30-degree tilt and up to 6.5 in of height adjustment.
Pros
- Built-in storage drawer for small accessories
- Swivels 180 degrees horizontally and tilts 30 degrees
- Height adjusts up to 6.5 in and extends 9.8 in from the desk edge
- Mounts to desktops at least 0.61 in thick with the adjustable clamps
Cons
- No platform size is stated
- No weight capacity is stated
- Not compatible with beveled-edge desktops
- No warranty term is stated
Detailed Review
AX WABER lists an under-desk keyboard tray with a storage drawer, 180-degree horizontal rotation, 30-degree vertical tilt and up to 6.5 in of height adjustment. It slides in and out, extends 9.8 in from the desk edge and includes a soft protective pad. The maker recommends desks over 25 in long and at least 0.61 in thick; beveled edges are not compatible. One note: the title lists a storage drawer, but the bullets do not describe it. No platform dimensions, weight capacity or warranty term are stated.
Who it's for: someone who wants a slide-out tray with a small storage drawer. Who should skip it: anyone who needs stated platform dimensions or a stated weight capacity first.
Its Office Score of 9.3/10 comes from performance 26/35, build 18/25, value 18/25, safety 0/10 and warranty 0/5: 62 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Height adjustment | Up to 6.5 in |
|---|---|
| Swivel and tilt | 180 degrees horizontal, 30-degree tilt |
| Extension | 9.8 in maximum from desk edge |
| Desk requirement | At least 0.61 in thick, no beveled edges |
Figures as published on the retailer listing, collected 17 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. This product does not plug in or run on a battery, so safety is not part of its score. No warranty term, so warranty scores zero. See How We Pick.
Moving desk, heavy load. Stay under the stated lift or weight capacity, leave slack in every cable, keep children, pets and fingers clear while the desk moves, and treat anti-collision as the maker's claim.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
As an Amazon Associate I earn from qualifying purchases.
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Compare the picks
| Keyboard tray | Office Score | Platform size | Height adjustment | Mount | Weight capacity | Warranty | Amazon |
|---|---|---|---|---|---|---|---|
| Mount-It MI-7139 | 9.7/10 | 26.5 by 10 in | 13.4 in range, 4.7 below to 8.7 above | Bolted under-desk bracket | 4.4 lb | Lifetime | View on Amazon |
| VIVO MOUNT-KB34S | 9.6/10 | 33.8 by 11 in | 2.2 to 6.5 in below desk, 12 steps | Under-desk sliding swing | 11 lb | Not stated | View on Amazon |
| VIVO MOUNT-KB04CB | 9.5/10 | 22.8 by 9.8 in | Not stated | C-clamp, 360-degree swivel | 11 lb | Not stated | View on Amazon |
| PUTORSEN PT04KT | 9.4/10 | 25.7 by 9.6 in | Articulating arm, 10.6 in reach | Pole clamp, 1.1 to 2.4 in | 2.2 lb | Not stated | View on Amazon |
| AX WABER Tray | 9.3/10 | Not stated | Up to 6.5 in | Under-desk clamp mount | Not stated | Not stated | View on Amazon |
Specifications are manufacturer rated as listed, collected 17 October 2026. One of the five states a warranty term; four state a weight capacity.
How we scored them
The Office Score weighs performance (adjustment, tilt, swivel and stated capacity), build (materials and item weight), value for the stated specs, safety and warranty. For a keyboard tray, safety means a stated weight capacity and a secure mounting method; four listings state a capacity and the AX WABER states none. Only the Mount-It! states a warranty term, a lifetime one. How we pick explains the weights.
| Product | Office Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| Mount-It MI-7139 | 9.7 | 32 | 22 | 21 | 7 | 4 |
| VIVO MOUNT-KB34S | 9.6 | 29 | 21 | 20 | 7 | 0 |
| VIVO MOUNT-KB04CB | 9.5 | 28 | 19 | 20 | 6 | 0 |
| PUTORSEN PT04KT | 9.4 | 27 | 18 | 18 | 5 | 0 |
| AX WABER Tray | 9.3 | 26 | 18 | 18 | 0 | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.
How to choose the best keyboard tray for sit stand desk
Match the mount to your desk
The mount decides everything else. The Mount-It! MI-7139 bolts to wood or MDF desktops at least 0.6 in thick, and is not for glass, metal or crossbar desks. The VIVO MOUNT-KB34S needs a desktop at least 0.75 in thick with 4 in of under-desk clearance. The VIVO MOUNT-KB04CB clamps on with no drilling but needs flat edges, up to 2 in thick, and is not for lipped or beveled tops. The AX WABER clamps to desktops at least 0.61 in thick and skips beveled edges as well. The PUTORSEN mounts to a pole 1.1 to 2.4 in in diameter, so it only works with a monitor arm, stand or wall mount to clamp it to.
Check the height range against your sitting and standing heights
A sit stand desk moves the desktop, not the keyboard, so the tray has to cover both heights. The Mount-It! is the only pick with a stated above-desk range: 4.7 in below to 8.7 in above the desktop, 13.4 in total. The VIVO MOUNT-KB34S adjusts 2.2 to 6.5 in below the desktop across 12 locking steps, and the AX WABER adjusts up to 6.5 in. The VIVO KB04CB and PUTORSEN state no height range, only rotation, so pair them with a standing desk whose lowest setting already suits you.
Weigh the stated capacity against the tray itself
| Tray | Platform | Stated capacity | Item weight |
|---|---|---|---|
| Mount-It MI-7139 | 26.5 by 10 in | 4.4 lb | 20.9 lb |
| VIVO MOUNT-KB34S | 33.8 by 11 in | 11 lb | 9 lb |
| VIVO MOUNT-KB04CB | 22.8 by 9.8 in | 11 lb | 9.75 lb |
| PUTORSEN PT04KT | 25.7 by 9.6 in | 2.2 lb | 8.58 lb |
| AX WABER | Not stated | Not stated | 9.77 lb |
Figures as stated in each listing. Check that your desktop can carry the tray weight plus your keyboard and mouse: the Mount-It! is the heaviest item here at 20.9 lb, while its stated capacity is only 4.4 lb. The two VIVO trays state 11 lb each, the PUTORSEN states 2.2 lb, and the AX WABER states no capacity.
Tilt, swivel and slide
Adjustment is where these trays differ most. The Mount-It! tilts +15 to -13 degrees, swivels 180 degrees and slides out 18 in on tracks, with a gel wrist rest along the front edge. The VIVO MOUNT-KB34S swings 165 degrees with 8.6 in of travel and locks into 12 height steps. The VIVO MOUNT-KB04CB gives a full 360-degree rotation but needs 32 in of clearance for the full circle. The PUTORSEN offers 360-degree rotation with a 10.6 in reach and +3 to -20 degrees of tilt. The AX WABER swivels 180 degrees and tilts 30 degrees. If sliding is your priority, our sliding keyboard tray guide covers trays picked for that, and a wrist rest for full size keyboard adds cushioning to the basic trays.
Read the warranty line
Only one listing states a warranty term: the Mount-It! MI-7139 with a lifetime manufacturer warranty and US-based support. The other four list customer service or tech support but no term.
Setup Notes
- Measure your desktop thickness and edge: the Mount-It! needs wood or MDF at least 0.6 in thick, the VIVO MOUNT-KB34S at least 0.75 in with 4 in of under-desk clearance, and the AX WABER at least 0.61 in.
- Check swing clearance: the VIVO MOUNT-KB04CB needs 32 in of clearance for its full 360-degree rotation.
- The AX WABER maker recommends desks over 25 in long so the tray can slide.
- Plan cables: the PUTORSEN includes clips that route cords along the arm. The other listings state no cable routing, so leave enough slack for the tray to move.
- All five include mounting hardware and instructions; the PUTORSEN also includes keyboard pads.
Frequently Asked Questions
Which keyboard tray has the widest stated height range?
The Mount-It! MI-7139: a stated 13.4 in range, 4.7 in below to 8.7 in above the desktop. The VIVO MOUNT-KB34S adjusts 2.2 to 6.5 in below the desktop; the AX WABER up to 6.5 in.
Can I mount a keyboard tray without drilling?
Yes. The VIVO MOUNT-KB04CB clamps to desktops up to 2 in thick with no drilling, and the AX WABER uses adjustable clamps. The Mount-It! and VIVO MOUNT-KB34S bolt under the desk instead.
Which tray states the highest weight capacity?
The VIVO MOUNT-KB34S and MOUNT-KB04CB each state 11 lb. The Mount-It! states 4.4 lb, the PUTORSEN 2.2 lb, and the AX WABER states no capacity.
Do any of these trays come with a stated warranty?
Only the Mount-It! MI-7139 states a warranty term, a lifetime manufacturer warranty with US-based support. The other four listings state no warranty term.
Which tray suits a monitor arm setup?
The PUTORSEN PT04KT clamps to poles 1.1 to 2.4 in in diameter, including monitor arms and wall mounts. It is the only pick that does not mount to a desktop.
Which tray has the largest platform?
The VIVO MOUNT-KB34S at 33.8 by 11 in. The PUTORSEN is 25.7 by 9.6 in, the Mount-It! 26.5 by 10 in, the VIVO KB04CB 22.8 by 9.8 in, and the AX WABER states no platform size.
Related guides
See every keyboards and keyboard trays guide and all monitor mounts, keyboards and mice guides.
More picks: ergonomic keyboard tray under desk, keyboard tray for desk with crossbar, keyboard tray for standing desk.




