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1 INTRODUCTIONDear Machinist, Customer and Colleague,As a manufacturer of cutting tools, our main objective is to ensure optimal production with the most advanced and high-performance tools that meet the requirements of modern technology. Machining the holes faster and more accurately reduces processing time and cost, and lowers the possibility of defective parts. Although the cutting tool is often considered to be of minor value, it is key to increasing productivity and quality. At ISCAR, we understand this fact well, and our ongoing research and design activities are aimed at creating cutting tools that will improve overall performance and make the machining process more effective.Intensive research and development have resulted in innovative and effective solutions for our customers' diverse range of requirements. As the variety of ISCAR tools is vast, it can be a challenge to make the right tooling decision for specific manufacturing needs. We hope that this guide will help you with the right tool selection and that it will be a useful supplement to the other ISCAR catalogs and leaflets. This handbook is divided into eight main chapters, considering specific features of holemaking and highlighting the latest holemaking solutions. The first chapter introduces general formulations such as the definition of types of holes and their designations, drill terminology, drill classifications, hole accuracy and surface roughness by drilling, tool holders, the optimal ways to machine holes, the role of coolant in drilling, as well as general information about ISCAR's holemaking lines, a comparison of exchangeable head drills vs solid drills, and highlights for a quick and easy way to select the correct solution.The second, third, fourth, fifth, and sixth chapters introduce which ISCAR products can be used for machining hole types according to the intended purpose, along with recommendations for cutting conditions, the correct use of the tool, as well as troubleshooting. The seventh chapter introduces general formulas and definitions for drilling. The eighth chapter introduces various types of ISCARgrades and their recommended range of use, as well as the material groups based on the VDI 3323 standard.We hope that this handbook will be a useful tool and a helpful guide for holemaking.