The Hazet 163-245/12 is a 12-piece tool set organized in the Safety-Insert System, designed for secure storage and immediate visual inventory control. The set is presented in the SmartCase S, which is equipped with a two-component soft foam insert measuring 172 x 114 mm. The Safety-Insert System absorbs shock loads for each tool, prevents transport damage, and ensures that missing parts are easily identified at a glance. The foam insert can be easily cleaned under running water, requiring only a brush and air drying. This set is compatible with all Hazet tool carts that have drawers. For optimal use with tool cart models 173, 179, and 180, the additional plastic insert 173-36/5 or the soft foam inserts 163-522x40 and 163-522x50 are recommended. The included tools consist of various sockets and wrenches suitable for professional and workshop applications where organized and durable tool management is essential. The construction focuses on reliability and long-term use, with the foam insert protecting against corrosion and unintentional shock loads. This organizational solution enhances efficiency through secure fixation and quick identification of tools, supporting a systematic approach to maintenance and repair tasks.