The Oregon 90407 chainsaw file set is a comprehensive kit designed for accurate and efficient sharpening of chainsaw chains. This set includes two 4.8mm (3/16 inch) round files, a file guide, and a depth gauge tool. The 4.8mm file size is suitable for sharpening chains with a 3/8 inch Low Profile or .325 inch pitch. The file guide ensures consistent sharpening angles, while the depth gauge helps maintain the correct raker height, crucial for optimal cutting performance and safety. This genuine Oregon sharpening kit provides the essential tools for maintaining your chainsaw chain in top condition.