Cheap Ebay roller rockers. Too good to be true?

I got one set super cheap..... they push the valve spring .roller was of set and the rivets that hold them ...
I send them back.

I install the PRW STEEL ONE on a friend 340, they fit and finish is way ahead of the aluminium one. I read some good review on them


save your money , at least the steel one or a good set of 273 adjustable rockers.