Based on the pic, you would only gain 4.8MM of spacing (2.4mm on each lug). You'd need 8mm of spacing to make these work.
I think they're designed for people who want to go from like 5x112 to 5x114.3
I agree with airjor, but IMO these seem safer than those sketchy adapter plates people use, at lest your wheel is resting against the factory hub. Not saying it's a "good" solution, but it's probably more safe than SOME alternatives