They are well suited as a rectangular clamping bracket. They are strong and accurate. At least as far as I can measure. However, it is incredibly stupid to inaccurately engrave the measurement scale. The millimeter scale is offset by approximately 3 mm and the inch scale is offset by 1/16 inch. Seriously, how difficult would it be to calibrate production facilities? If you do something, at least it's right. I'm sending it back and ordering something similar from another manufacturer. Sigh.