Ozzistraightshooter  Die for Springfield 1.04 inch x 10 TPI SQUARE thread.
Top quality High speed steel.
 
Die will clean up your lathe cut thread for a better fit.
 
Die is split with fine adjustment. Difficult to manufacture square thread.
 
Generally you need to start the thread on a lathe and use the 
die to improve the square thread for a perfect fit
 
Finest ground high speed steel.
These are top quality tools designed for professional use.