Husqvarna File Kit for H37 Chain 3/8" Mini 4mm / 5/32" (579653601), Complete filing kit to simplify the work of keeping your chain in trim. With a correct sharpened chain your work will be easier and safer. The file kit contains a file handle, combination gauge or a file gauge and depth gauge, two round files and one flat file. Please note the library picture above shows 2 kits, you will receive one of these. Colour of file handle will vary.