Book excerpt: The flex-shaft is an essential tool for bench work, and jewelers will often have several at hand. But too often those jewelers don't know how to take full advantage of the flex-shaft's capabilities. This book will help to change that. It offers insights and advice on how to choose the proper system and maintain it, as well as which accessories you need to accomplish specific tasks. In addition, it offers "out of the box" ideas gleaned from Ganoksin.com and the pages of AJM Magazine, published by Manufacturing Jewelers & Suppliers of America.