I saw the same kind of inexpensive goods, but though I thought it was somewhat expensive because the evaluation etc is rusty etc, I bought it. There is room for improvement because there is a sheet metal part whose mounting hole pitch is not accurate as already had comments. There is no problem in use, but the stand's mold (backside) is pretty rough.
The hole of the roller mounting base and the tap position of the main body are not aligned, so bolts did not enter as it was. It was troublesome to return, so we used one of the holes in the mounting plate to process it and install it. That is the point of dissatisfaction.