KINJOEK 2 PCS 14 Inch Under Desk Keyboard Tray Rails Slides, Adjustable Height Heavy Duty Ball Bearing Keyboard Mount Track, Silver

I have ordered two of these and they both have lasted nearly a year on the dot before the bearings broke out of them. I even greased them up on occasion with NLGI 2 grade grease "the stuff for wheel bearings on cars" and it did seem to extend the life of the bearings by about two months.

Pretty much identical to the ones that came with my Sauder desk. It took me 10 years to break those, so, hopefully these last just as long. The ability to adjust the height is a feature my old keyboard tray did not have, so I was able to ditch some blocks I had fixed under the brackets to give me extra height, which was nice. I reused the screws from my old tray as the ones that come with these are smaller, and while they are are probably fine, since I had beefier ones, I decided to go with that. I would say invest a few dollars and get some longer screws for extra stability.

Item is junk, I regret this purchase. Ball bearings do not stay in place so the more you use the item the more you'll encounter issues. One side will move and one side will not, untill it get competely jacked up like mine is. I've had mine for installed for.less than 30 days, used it at maybe once or twice a day, one side has a horrible squeak, the other side will not pull completely out, one side pulls out at a different rate than the other, its almost to the point it is unusable. Poorly made, junk ball bearings, wasted my money and time. Spend a few dollars and buy a decent one first time around, dont waste you're money on this one like I did.

It is exactly how other reviewers described. Make sure you line it up properly underneath so the slide does not scrape against the metal mount. It was initially a little squeaky so I greased the bearings and no more squeak. It does have a metallic noise when you push it in or pull it out. It's a low class mount. Not a quiet, smooth gliding mount youd find in a nice piece of furniture. But it's functional and it supports my keyboard. So its fine. I took one star off because installation was finicky without having a pattern for where the screws go.

This was a little difficult to install. I wish there was more of a snap on design so it is easy to assemble. Getting a screw in the hole to attach the rails to the mounts was a bit difficult under the table.Also, I wish it had a locking mechanism when the tray is pulled out so it does not push back in without some assistance. That is useful for a keyboard shelf.The mounts are sturdy so that is a plus. However, two of the heads broke off the provided screws so I would recommend using your own mounting screws. I wish I had.All in all, the price made it worthwhile but now I wonder if I had gone with something a bit more pricey, I would have gotten the features I mentioned.

Only gripe is the length of the extension brackets the big ones could of been a bit longer as i had to cut the trim on the front of my desk to gain more clearance and if the small ones had been a bit shorter I could of used them to connect my keyboard tray to the rollers themselves adding a little extra support/sturdiness to the tray itself. on a side note just because i dont recall seeing it in the description these can also be side mounted both with/without the brackets.

I used this for a super light keyboard on a desk I built, when I first installed the unit it worked perfectly, after about a week the bearings that extend the slide to the open position started to fall out and it was tough to open and close, eventually the tracks became unusable. There is a 30 refund, but I was building the desk when I ordered and it sat for too long to exercise that option… maybe mine was just a dud, or maybe not… I don’t know because I took too long to try and get a replacement…

No instructions came with them which is probably understandable. Figured out how to install it on a computer table for the keyboard support tray. Quality is not bad. I recommend it.

bought these at a good price. For what I will use them as is they are flimsy but I sanded the edges and put them together then a few weld tacks and sprayed paint ,they will be withstanding the hard work when I'LL attach my force feedback wheel on the shelf they will be used on. If you only plan on using it for simple keyboard and mouse it will be great as is.

I installed them under two desk boards and saved space on the tables. They are very good!

The only reason I am giving this product a 4 star is because I can’t give it 4.5. This is honestly amazing. If you have some wood or want to make a pulley under you’re desk i highly recommend this puppy. It looks great as well no matter what colour I got two of these and one is on my sisters desk the other is on mine. She has a pure white desk with the black rails complimenting her white desk. Meanwhile my desk is pure black and it seamlessly fits. The only issue is time to time you will have to re-grease it as the track gets stuck but I have had mine for well over a year now and it still functions amazingly

Apart from there being no instructions for assembly, as you can see in the pictures, they provided me with 2 different bracket sizes.Also, one of the brackets doesn't pull back far enough to allow for a 3rd screw towards the back, for stability.Finally, they didn't provide enough screws.- 4 screws to screw each plate together (which makes sense).- 9 wood screws (yes, NINE). Even if you cheap out and go 2 on each side of the tray (to hold the brackets to the tray), I'm left with a whopping 5 screws for for arms that attach it to the actual tabletop/desk. It's like someone just grabbed a bunch of screws and parts and threw it in a bag saying, "Who cares, we got another sucker!"

Le rail ne glisse pas très bien. Il y a beaucoup de friction par rapport à des produits similaires. Aussi, les supports se fixent par l'intérieur ce qui rend l'installation laborieuse. De plus, les plaquettes du rail se sont défaites après quelques mois d'utilisation. Irrécupérable. Je ne conseille pas ce produit.