Alright, I have seen some people interested in the six slot stuff. I too have little info on the ones i do own. They were sold to me with Shelby on the plastic chrome centre caps with five screw holes. The labels are paper stickers with a cobra on them and the name over top. The rims themselves have no company name cast in. They are fifteens, eight inches wide, magnesium, and fit 5 x 4 1/2" hubs. My Cal 500's that do have Shelby cast in are magnesium as well, but only have the regular 5-slot design. Did Dragmaster put their name into their wheels? Some of you seem to think they are the only 6-slot manufacturer.