This step drill bit set contains three tools with working ranges of 4–12 mm, 4–20 mm and 4–32 mm. The diameters are graduated in 2 mm increments, and clear markings on the drill bits make it easier to select the required hole size. The stepped design reduces the need for frequent replacement of conventional drill bits during assembly, installation and locksmithing work.
The working parts are made of HSS high-speed steel with a titanium coating, which increases wear resistance and helps reduce friction during drilling. The drill bits are suitable for metal, thin sheet metal and selected plastics. When working with metal, it is recommended to use oil or a cooling and lubricating agent to limit heating of the cutting edges.
The hexagonal shank with a declared diameter of 6 mm supports stable clamping in a compatible drill or cordless screwdriver. The package includes a practical case with separate compartments for individual drill bits, making storage and transport easier.
