Key course topics covered. Details of locksmith operations, their purpose are given; on bench tools, accessories and equipment. Techniques for performing locksmith operations and their control are described. Recommendations are given on the organization of the workplace and safe working methods. A separate chapter is devoted to metal cutting on metal-cutting machines. High-quality illustrations greatly facilitate the assimilation of the material. For vocational students. It can be used by students of secondary schools, as well as students of engineering specialties of technical universities.