books.google.co.uk - This unique handbook provides total coverage of issues related to countersinking and chamfering holes, including history of their use, design reasons, and basic cutter design. It features "how-to-use" details of the most used tools and techniques and complete information on the subject of countersinking...https://books.google.co.uk/books/about/Countersinking_Handbook.html?id=esWtCQuLWtIC&utm_source=gb-gplus-shareCountersinking Handbook
