 However, with the start of World War II the demand for metals made the manufacture of saws too expensive and many of these companies went out of business.By the year 2000, only three companies in the United States—Mussehl & Westphal, Charlie Blacklock, and Wentworth—were making saws.In 2012, a company called Index Drums started producing a saw that had a built-in transducer in the handle, called the "JackSaw".