This genuine Stihl file set is specifically designed for stihl machinery offering the highest production standards and durability the Stihl brand commands. The Kits consists of a file holder with 4mm round file and wooden handle and a Flat file with wooden handle. File gauge. Pouch to enable the user to take this product anywhere to use on the go. File size is 5/32in for use with 1/4in and 3/8in Stihl chain saws.