backing plates

i found this backing plates set up at carlisle, somebody can tells me more about these....

thanks...

 

Let me guess you got them from Mr Paxton. Not exactly sure if they are Frankland's but they are known as skeleton brakes. They are a dirt track thing.
Clark

 

they look different from my franklands.....

 

saw them too, but got there to late,they take buick wheel cyl's & shoes.