you get what u pay for...they look usable but i couldn't tell if the pillow bearings are greasable. also, they appear to be mild steel with no anti-corrosion coating so will probably rust badly over time. ditto the adjustment setup. they look sturdy enough but u will have to pay attention to them.

 

True... It's difficult to trust something so cheap (at times).
Wish it had some specs and a name so i can look it up.
But i'm sure there's a reason for that.