The filing kit comprising 2 round files, 1 flat file, roller guide, depth gauge and handle . This is highly recommended (choice of sizes to suit all types of chain and all chainsaws) The guide ensures you will be filing at the correct angle for your chain, as well as making it much easier to file. The filing kit for the 137, 142, 235 and 235e Husqvarna chainsaws is the .325 pixel. The filing kit for the 236 and 236e Husqvarna chainsaws is the 3/8 LP. The filing kit for the 240e Husqvarna chainsaw is the .325 pixel for machines up to approx. March 2010, and the 3/8 LP kit for machines after approx. March 2010. If you are not sure which one you have, please ring us. If you are not sure which file kit is suitable for your chainsaw, please either email or ring us and we will let you know which is the correct kit.