2Pcs SBR20-200 with 4Pcs SBR20UU Square Type Block Bearing, Linear Rail Overall Length 7.9 inch(200mm) for CNC Machine and 3D Printer

Exactly what I needed for router sled. I had an issue with 2 of the bearings, wrote to customer service and had replacements in less than a week! Linear rails are heavy duty and router is riding smoothly. Full size Makita very heavy! Totally happy I finally ordered these!

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.

These rails were better than I expected. Sturdy, stout, smooth. Really like these and will buy again.

Today I had a job to do and I was hoping to do it easily and efficiently with the help of the rails I bought a couple of months ago. I opened the box, started assembling the tool and discovered defective parts. I'm very upset and my job is standing still.I bought two pairs of rails, different lengths. They come with eight SBR20UU sliding blocks, six of them work perfectly, two do not work. One moves very tightly, the other cannot be installed on the rail - it is very tight, something is wrong with it.

Lo Utilizo Como Guías de Taladro. Y De Torno para Madera.

Shopping here is very comfortable. If you know what you need, they make it easy to find and the price is very competitive. Shipping is quick!

They worked perfectly, I used them to extend a seat on my old Willy’s wagon to allow access into the back seat. They worked perfectly. I can see many applications for the slides.

As the bearings slide across the span of the rail, it sounds like the ball bearings are resisting a bit, causing a louder motion than I expected. I saw, after purchasing these, that some are advertised as "quieter". I will try that one next time.