Walker Wopper Jaw Slip Jackets

Foundry / Metal Casting Molding Jackets -  
Used - 
Manufactured by Walker 

Originally used for Bronze & Aluminum sand casting foundry work.

These are used to hold sand casting molds together when pouring metal into the molds. 

Only one of these has a label. 


The wopper jaws taper. 
It measures at the large end 21 in x 11 in
It measures at the smaller end 20 in x 10 in  

I got it from a local college who had discontinued their casting classes. 



Not really made for jewelry, it is too big.