Nan,
It sounds like the item you described could  possibly be a file. The knobs 
serving as handles.
 
Jay Cohen
 
  
 
 
In a message dated 7/7/2011 8:50:04 P.M. Eastern Daylight Time,  
[log in to unmask] writes:

Hi  all

We have recovered a rusted (naturally!) piece of iron from  Seneca  
Village (ca 1825-1855). It has tiny serrations along one side  and  
looks almost like a barette in shape, only heavier; 2 long  parallel  
edges (1/2 to 3/4" in width)  with heavier knob-like  attachments at  
each end.

Any thoughts as to what it could  be?

thanks a lot

Nan A. Rothschild

Director of Museum  Studies
Columbia University
212 854-4977

Research  Professor
Barnard College
212  854-4315