Material and durability - The metal files are made of carbon steel with high hardness. The fine-grained rasp texture is deeply quenched and coated for long-lasting cutting performance. Set contents - Includes six shapes: flat steel file, flat protective steel file, square steel file, triangular steel file, round steel file, and semi-circular steel file. Ergonomic design - Ergonomic, non-slip rubber handle provides a secure grip, even when the hands are wet. Hanging holes at the bottom of the handle allow easy storage and placement. Ease of use - The precision metal file has a clear surface grain, and the gear teeth of the metal file are clearly formed to promote cutting efficiency. Do not use a steel needle file as a crowbar, as it can break easily. Applications - Deburring, edge finishing, and precise shaping of metal parts in mechanical assemblies, hardware, and automotive projects. - Detailed work for models, small fittings, and jewelry where multiple file shapes are beneficial. - Finishing curved surfaces and tight corners in metal components that require controlled material removal.