A complete step-by-step construction guide. Peter Fronteddu and Stefan Steigerwald demonstrate in this workshop manual: - how to design a folding knife with a back-lock mechanism - how to create a functional template - how to manufacture the individual components - how to assemble them into a complete knife - how to ensure flawless functionality. They explain the fundamental principles and present various options for technical solutions tailored to the workshop equipment and the preferences of each knife maker. This allows the reader not only to replicate a specific knife but also to gain guidance for independent work with their own designs. Every step, from the initial design sketch to the final finish, is clearly explained in words and pictures. Supplementary functional drawings and graphics clarify the important connections.