What tool is best suited for filing metal?

The mill file is designed specifically for filing metal, making it the best choice for this task. Its flat surface and fine teeth enable it to effectively remove material from metal surfaces, creating a smooth finish or precise shaping. Mill files maintain their cutting edge and provide a good balance of control and effectiveness, which is essential when working with hard materials like metal.

In contrast, rasps are typically used for shaping or smoothing softer materials, such as wood, due to their coarser teeth, which are not ideal for the precision required in metalworking. Sandpaper, while versatile, is generally more suited for finishing and polishing rather than heavy filing tasks, particularly on metal. Additionally, a hand saw is designed for cutting rather than filing; it lacks the fine control and specific design needed for smoothing or shaping metal surfaces. The mill file’s purpose, design, and material compatibility firmly establish it as the optimal tool for filing metal.