These are great, nice and useful. easy to adjust and clamp something down and also be able to reach/bend over to get to something behind it. Cant do that with a 300mm clamp post :). And when doing repetitive work these are great as you do not need to adjust to clamp back down. I like the adjusting screw in the back like a vise grip. I have seen some other versions out there with a crank handle, which I would think would get in the way. I have not used any of those yet, but like the use/design of the line you cary. I will be getting some more of these down the road!