Book excerpt: Flexible shaft and hand-held motor tools are a tremendous help to those who make jewelry, improving both productivity and quality of work. But with such a bewildering array of different tool bits to choose from, and new ones coming out every year, it's difficult to figure out which ones will give the best results for each project. This book examines the wide range of tool bits available and discusses the merits of each.Learn about different types of drill bits, the three most useful cutting burs, six different types of sanding bits, five ways to polish your work with the Foredom or Dremel, and five bits that can be used to add texture to your jewelry pieces.In each category, the author gives his experience on which tool bits save the most time and which will improve the quality of your work. Also included are bench tips for getting the best results and cautions for safe use.