U.S. Navy World War I cranial trepanning brace and bit set.
See pictures for condition details. 
Looks complete and in a good condition. 
Not sure if it is WW1 or WW2 (labeled as WW1).  
Comes from estate out of New York.

The box is 10 inches by 6 inches.

vintage surgical kit historically used for performing trepanation (the practice of drilling or scraping a hole into the skull).

  • The Brace: A chrome- or nickel-plated steel hand drill frame designed with a manual sweep handle for precise rotation.
  • The Bits: A selection of interchangeable cutting bits (trephines or burrs) in varying diameters, used to cut through bone.