Can You ID this Piece of Gear?

I bought this piece of gear at a swap meet. Can you tell me more about it?

I think they are rock-n-rollers. I remember a partner of mine in the late 80s early 90s had a set. I thought the lowe(camp) balls were better.

You can get some more from ebay.com/itm/Vintage-Set-Ro…

More info is here needlesports.com/NeedleSpor…

and

rockytopguides.com/blog/

and even a patent

theclimbinglab.com/tiki-ind…

Thanks, Climber Pat, for the great info.

Go-Pro Rock-n-rollers from the 80's I have a set along with Metolious sliders , Lowe balls , HB cobras and kong ? Great thin crack "injection protection"