سوهان یا File ابزاری کاربردی به جهت ساییدن و صاف کردن سطوح چوبی و فلزی است که از یک دسته و یک سطح فلزی شیار دار تشکیل شده است و قبل از این که فلز میله سخت شود ، شیار ها را بر روی آن به وجود آورده اند . سوهان ها دارای مدل های مختلفی هستند .

Instruction

Not allowed to use the new hard metal rasp setback.
Allowed to use the rasp setback hardened material.
There are crusty or sticky sand forgings and castings, shall grinders will be worn away after it, is available with a half sharp rasp filing.
New rasp first use side, when the blunt face, and then the other side.
When filing, often with a wire brush to remove swarf toothing on.
Files can not be overlapped or stacked together with other tools.
When using the rasp not too fast, or easy to premature wear.
Rasp to avoid wet, contaminated with oil or other dirt.
Fine soft metal rasp file is not allowed.
Needle files using force should not be too large, so as not to break.