I bought these for cases where a traditional end clamp cannot hold the pocket screw blanks, namely when the parts to be joined are of different widths and do not sit flush. both sides. I was a little skeptical as I had never heard of this brand before, but the price seemed great compared to the Kreg clamps and the clamp depth was greater too. Overall I found them to work flawlessly and are easy to use. . An added plus is the ease of use of the large knob that turns easily when the clamp is attached to the workpiece, a feature I need because I just can't tell the depth of the clamp with my eye (someone who can ? ).