CNCMANS SBR20-800mm Linear Rail Linear Rails and Bearings Kit 2Pcs SBR20 800mm Long Fully Supported Shaft Guide with 4Pcs SBR20UU Linear Bearing Slide Block Linear Guide for CNC Equipments

Exceptional Linear Rail Kit, smooth and precise. I used this with a SpecTool Router Sled Kit. These rails precisely fit together with this sled and perform excellently. I'm very impressed with the rollability of these rails. They are smooth and durable. Overall construction is superior and resulted in a very professional router sled for my use. I am more than pleased. I did contact the seller with a couple of questions, and they quickly and accurately responded. It was a very nice experience. Highly recommended! These are an exceptional value for their high build quality and customer support.

These did what they claim they do. No issues with these so far, at all. So I ordered more as I have many uses for them.

Great rails but with just a little bit of flex. I used these for a router sled. There were two drawbacks. The first was hunting for the correct screw size of the holes on the mounting blocks. (Metric6 by the way) The second if a little bit of flex in the rails. For a full size router I may have to go back and add some steel underneath the rails so they don't sag.

Installed these rails on my concrete plasma machine and so far they work s long as you make sure that no debris get into the bearings.

Slides very smooth and works perfectly.

Good quality, great buy

Product was fine, but I am missing the end alignment dowels which wasn’t a big deal because I am not in a rush. Reached out to the manufacturer for resolution with no response. When you purchase anything a big part of quality is support. That’s why they received one star.

Saved myself thousands using these rails to build a router sled. Great ball bearing action, heavy stainless rails, solid. Great choice for any heavy-duty slide applications.