Of a probe.
Kingsley
A N
AN
D004574:Electromagnetic Fields; D013502:General Surgery / Q000266:history; D049672:History, 19th Century; D006801:Humans; D010330:Patents as Topic; D013523:Surgical Equipment / Q000266:history*; D014481:United States; D014948:Wounds, Gunshot / Q000266:history*