This document provides information about JD Diamond Tools, a company located in Chennai, India that produces polycrystalline diamond (PCD) and polycrystalline cubic boron nitride (PCBN) cutting tools. It includes contact information for the company, tables of contents, introductions to PCD and PCBN applications and grades, cutting recommendations, and grade comparison charts. The company manufactures a variety of PCD and PCBN tools, including inserts, turning tools, boring tools, reamers, end mills, and custom tools according to customer specifications.