I can say that overall the Harbor Freight clamps do their job. It seems to me that they only design for the simplest of tasks. But their price is still a bit exaggerated. I wish they were cheaper. Otherwise, they are only worth buying at a discount. You can use many different clamps to achieve the quality you want. When I was repairing my engineering equipment, I
ordered some clamps online [sandfieldengineering.com] that a friend recommended. To my surprise, they adjusted to any size, so I used them often. In this case, you better use these special clamps if you want to get good results. You can get a better look at them at the link I attached above.