VEVOR Linear Rail Slide SBR20-800mm 2 PCS and 4 PCS SBR20UU Slide Blocks Linear Guide Rail and Bearings Kit for Automated Machines DIY Project CNC Router Machines

Very well made. Quite heavy. Slides well but one has to purchase additional ends.

Amazing deal for the money. Straight with almost no play when all four are working together. Holes are tapped all the way down. Drag adjustment screws are very useful.

Dead on straight. Used these to build X-Y router sled for milling large slabs.

Llegaron todas las piezas , es nuevo totalmente excelente calidad

Uno de los rieles estaba torcido

Rails looked good and three f the four bearing slides moved smoothly. One of the four was defective and would not work. The rails are made very well, but the bearing slides are cheap junk. I thought I would keep this set anyway if I could order replacement slides for a reasonable price, but they cost almost as much as the entire set. Makes no sense since the rails are heavy and contain 98 percent of the weight and work. So…I just decided to return it all. Disappointed. May try to reorder again later but I don’t have confidence in the cheap bearing slides. The slide frames are decent aluminum blocks, but the inside is plastic and very cheap BB type balls.

It is perfect

I ordered by mistake. They refunded w/o quibble. Super HQ build and smooth running but NOT completely silent. 100% guaranteed for BIG DOORS!!

Comme décrit sur le site. Très bien emballé .

Produit très sérieusement emballé et finement huilé comme il se doit, parfait. Les rondins sont rectilignes sans aucune marque de surface assurant un glissement très régulier.

At such a low price I should have known that these were not really a bargain. As soon as I opened them I realized that they were duff. 3 out of 4 blocks would not slide down the rail under their own weight with 2 feeling so rough that I would not be surprised if they were second hand....... They very precisely do not do the one thing they were designed to do.