Combination Wrench - Chainsaw

Overview The Stihl Combination Wrench – Chainsaw (1129 890 3401) is designed for chainsaw maintenance, specifically for tensioning the chain and changing the chain on compatible Stihl equipment. Specification Detail MPN 1129 890 3401 Brand Stihl Parts and Attachments Category Hardware > Tools Socket Sizes (Across Flats) 19mm / 13mm Tool Type Combination Socket Wrench (Multi-Purpose) Technical Features Dual socket sizes: 19mm and 13mm — provides two fastener engagement points in a single tool, reducing the need to carry separate wrenches on the job site. Multi-purpose combination design — performs both chain tensioning and chain changing functions, consolidating two common chainsaw maintenance tasks into one instrument. OEM Stihl specification — manufactured to Stihl's part standard under MPN 1129 890 3401, ensuring dimensional compatibility with compatible Stihl chainsaw models. Applications Tensioning the chainsaw bar chain during routine maintenance or field adjustment. Removing and replacing the chainsaw chain when worn or damaged. General fastener work on compatible Stihl chainsaw hardware requiring 19mm or 13mm socket engagement.