But honestly it was very difficult to get them to fulfill this requirement. Spring is very hard. What it should be to keep work safe. (However, I can't help but predict the future when these springs will weaken with continued normal use and there is no other way to increase the vise pressure.) I don't have to worry because I don't have the arm strength to tighten them use at all. The middle triangle that moves needs to be centered with the hard springs pulled back and the wood (2x4 doesn't fit as far as I know) between the braces. Strong hands will find this a little quicker than twisting to tighten the corner clamps. But I'm not sure how long they will remain useful.
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