MINNEAPOLIS, October 10 /PRNewswire/ --

Third Wave Systems announces that David Arnold, former Vice President and
Chief Technical Officer of Kennametal (NYSE: KMT), has joined the company's
Board of Directors. Mr. Arnold was elected last month at EMO Hannover and
will attend his first board meeting next week.

"Dave brings an incredible wealth of industry knowledge and wisdom to
Third Wave, from having helped run one of the largest cutting tool companies
in the world," said Kerry Marusich, Third Wave Systems' CEO. "Dave is going
to be a terrific director, and we're excited and honored that he has chosen
Third Wave as his first private sector board to serve on."

This addition will help Third Wave Systems in its ongoing pursuit to
provide customers, especially cutting tool companies, with new, easy-to-use
modeling technology to improve their efficiency.

"I have respected the machining systems and solutions provided by Third
Wave Systems for more than ten years. I am pleased to be joining their
board," said Arnold.

About David Arnold:

David B. Arnold retired in August 2003, as the vice president and chief
technical officer of Kennametal Inc., Latrobe, Pennsylvania, after 24 years
with the company. Arnold managed the activities of Kennametal's world-class
Technology Center and directed all global research and technology functions
(development of new products, materials and applications; improvement of
existing products and applications; and research and development of product
manufacturing procedures and techniques). He also directed all technological
operations that support the corporation's product manufacturing and sales
operations.

Before joining Kennametal, Arnold was in the materials and process
technology laboratories, Aircraft Engine Group, General Electric Company,
Evendale, Ohio. Prior to that, he was with Fansteel and DuPont, both in
Baltimore, Maryland. Arnold earned a Bachelor of Science degree in
Metallurgical Engineering at Virginia Tech, Blacksburg, Virginia, in 1962.

Arnold has served on the Board of Advisors, Machining Technology
Association of the Society of Manufacturing Engineers, was vice chairman of
the Board of Innovation Works in Pittsburgh, and has served as a past
director of the Latrobe Area Chamber of Commerce. He led the effort to have
the Department of Defense establish the National Center for Defense
Manufacturing and Machining at Kennametal and served as its first Chairman of
the Board.

About Third Wave Systems:

Founded in 1993, Third Wave Systems provides material-based, machining
modeling software and services used by Fortune 500 aerospace, automotive, and
cutting tool companies to realize substantial cost reductions in product
design and manufacturing. Headquartered in Minneapolis, Minnesota, USA, Third
Wave Systems also has offices in Detroit, Michigan and in Rotherham, UK. The
company has major distributors in Europe, Japan, and Korea.

Web site: http://www.thirdwavesys.com