The genuine STIHL FG 4 Filing Device (Part Number 56120007500) is a versatile and essential tool designed for accurately sharpening STIHL saw chains. This robust device features a file holder and a depth gauge, enabling precise filing angles and consistent depth gauge settings for optimal chain performance. It is compatible with 3/8" P, .325", 3/8", and .404" saw chains. The FG 4 can be securely mounted on a workbench or stump, providing a stable platform for efficient and safe chain maintenance. Weighing 1.2 kg, this filing device is built for durability and ease of use, ensuring your saw chains remain sharp and ready for demanding tasks.