Super nice and ridged!!!!
For the price I didn't know what to expect, they are made perfect.
Takes less than 20 seconds to adjust out the play in them if the cold roll bar you need to buy ever wears down.
I was going to try and make them but its not worth it if you don't have the right equipment even then if you are not making a lot don't bother just buy them you wont regret it, spend the time you save designing your cnc better.
Well worth it, going to buy 2 more to finish my z axis.