This book is a new up and coming all in one Reference book for the CNC machinist. This book covers basic Mill and Lathe G-Code CNC programming. In addition to basic programming this book has many useful formulas and charts for everyday use for the CNC Machinist.Counterbore, Centerdrill, Countersink, and Internal and External Thread Charts. Trig reference page. Drill point/countersink diameter formulas and also Surface Footage formula with Chart.Please check out my complimentary books: CNC Programming: Basics & Tutorial CNC Programming: Basics & Tutorial Textbookwww.cncprogrammingbook.comwww.cncbasics.com - Projects & Discounts