The STIHL 1129 890 3401 is a genuine OEM combination wrench (commonly known as a scrench) designed for servicing compatible STIHL chainsaws. It combines a 13 mm spark plug socket with a 19 mm bar nut socket, allowing quick removal of spark plugs, guide bars and chains using a single tool. A flat screwdriver blade is incorporated into the handle for convenient chain tension adjustment, making it an essential workshop and field maintenance tool.
