2Pcs SBR20-400mm/15.7 inch Linear Fully-Supported Rail and 4Pcs SBR20UU Block, Linear Motion Bearing Block for SBR20 Linear Guide Rail for CNC Machine

These work the way I had intended. There was a slight curve to both rails (I did not take a picture), the curve didn't bother me for my purposes because I knew they would lay flat enough once I put some weight on them. I had to cut about 6" off each one (they were toolong) and they were extremely tough to cut, it dulled my horizontal bandsaw blade so I had to switch to a metal cutting chop saw with an abrasive wheel, which still took a while. I used these linear rails as drawer slides for a truck bed drawer I built. The slider has been in my truck for about 8 months, so far so good. The truck was driven on the beach a few times after install, and the rails and bearings stood up to the sand and all the bouncing through the rutted sand. I love the convenience of a sliding drawer whenever I go shopping for groceries too, I don't have to climb up into my truck to get bags that slide towards the cab. I have included pictures of the build, you can see the linear rails in the first picture, and the finished product in the last 2 photos. I have a couple modifications I want to make, such as adding tie down points to the box and a removeable divider to keep things closer to the tailgate when I am not using the full drawer.

These worked great for my router sled

When I received these rails, I was very impressed with the quality material used for these pieces! These are perfectly machined and not made with flimsy, substandard materials. You just don't see this type of quality much anymore. They easily handled the load that I used them for (but rated much higher) - with very smooth gliding action. I can't say enough about the quality of these pieces - and at an affordable price! Would highly recommend these rails for most any application where quality is critical.

Using it for a sliding base on my flight sim chair. Only dropped a star for two reasons: one bearing drags badly and there's no grease on said bearings. Otherwise it's fine. I am around 200 lbs plus an additional 100 ish lbs for the seat and other stuff. Slides fine except the one that's dragging but otherwise works fine.

Used to make a router sled. Works great

Well made with exacting tolerances. I'm very pleased

Item arrived as described and in mint condition, recommended.

Hardware was wrong length. No washers. On top of that the holes dont line up for hardware what a JOKE! One of the rollers does not roll well and binds up. I have had to spend hours DRILLING holes to get the hardware to fit track with supplied hardware. Then I had to go to hardware store to purchase spacers for 10.00 because the hardware is too long and bottoms out. Very displeased with this purchase.

Solo llegaron dos rodamientos, faltaron dos, en el pedido decia que venian 4.