Chinese junk! Arrived with a broken thread on the adjustment screw (on one of the clamps). It also says it can clamp 2-3/8", but the smaller blue wedge doesn't rotate enough to clamp more than 1-1/2" directly. You can pinch more, but the little blue wedge will not be flush with your part, only the bottom edge will touch your part on larger items. Too bad, I wanted them to work.