EXHIBIT 16 Office of the Chief Accountant Securities and Exchange Commission 450 Fifth Street, N.W. Washington, DC 20549 May 15, 2002 Dear Sir or Madam, We have read Paragraphs 1 through 5 of Item 4 included in the Form 8-K/A dated May 1, 2002 of Kennametal Inc. to be filed with the Securities and Exchange Commission and are in agreement with the statements contained therein. Very truly yours, /s/ Arthur Andersen LLP - ------------------------ Arthur Andersen LLP Copy to: Mr. F. Nicholas Grasberger III, Vice President and Chief Financial Officer Kennametal Inc.