I didn't realize this, but I think the 2 links I posted show different models of the 3 axis clamp (hence the price jump between the 2). It's still a pretty steep cost if you are planning to buy 4 (or even just 2) of these at $145. I never had luck with the fancy clamps used at my work, and the journeyman welder at work apparently shared my view as I never saw him use them either when tacking or welding. However, I don't know if the ones we had were Stronghand name brand clamps or not. Just my 2 cents.