This was a about 1.5 years ago, I think they were the same as the G.I. Cromo Race Riser, but yeah they were steel. They were also a b*****d to get the shim to stop slipping. Personally I don't really rate atomlab products. I would be far tempted to go for DMR or Gusset Bars, the open prison 3" look pretty good never tried them though. Ignore