I bought a set 15 x 7 from Summit a few ago too. They are non-unilug and are Made in USA. I went to Summit and picked them up. The guy that brought the out said "these are the good ones" when I opened the up to check them out. They still look like new. They get a light polish and wax every winter before hibernation.The Direct Drill (not the Uni-Lug) Cragars I bought a couple years ago were Made in USA.
Aluminum center, steel rim. I also waxed them. So far so good.