The tool construction book is a teaching and working manual that presents the most important techniques in tool construction, such as stamping technology combined with cutting and forming technology, mold technology with injection molding, fixtures and gauges, along with their structure and application in a factual and student-friendly manner. Additionally, the specialized book includes fundamentals and application notes for measurement technology, as well as the use and heat treatment of materials in tool construction. Manufacturing technical representations of the most important machining processes, such as CNC milling and eroding, complement the content. The chapters on CAD in tool construction and maintenance, redesigned in the last edition, have been supplemented with new topics on machining with CAM and calculations for bending. The layout of the pages has been redesigned. Methodological tips for teaching through case studies, the preparation of learning fields for tool mechanics in learning situations, and a collection of projects in tool construction facilitate the design of teaching units. Digital supplementary materials in the European library related to the projects and the review and deepening questions, along with illustrations and tables from the book, animations of tools from HASCO, and presentations of student work, enhance and complete the specialized book. This specialized book is primarily aimed at trainees in the professions of tool mechanic or precision mechanic with a focus on tool construction. Those preparing for a master or technician examination, creating a semester thesis, or seeking personal further education will find many technical inspirations in this book. Sections 2, 5, and 6 are also of interest to process mechanics for plastics and rubber technology.