Very convenient file Ø 4.0 mm. Designed for sharpening cutting chains with pitches of 1/4" Rapid and 3/8" Picco. 

This file is created according to the 2 in 1 formula, and includes both two round files and one flat file. 

This allows you to sharpen the cutting tooth in one pass and grind down the cutting depth limiter, which significantly

 saves you the time of sharpening the entire chain. Thus, you will not need a separate flat file or even a template

 for the cutting tooth stop, which is very convenient. Note that the files themselves, after wear and tear, 

can be quickly and conveniently changed.