Couple of holes for studs are larger than normal. Both of diameters are about 17 mm or more, and the holes are tapered. So I can't set accessories straight(vertical), and the holder itself is wobbly even if tighten the screw..... not steady. But surface finishing is good for the price. Just only appearance is great.
It's really a good item, I have already some other holder of a famous brand that are just a little better but the price is about ten times this one, perfect.