PFERD manufactures the 11098040 chainsaw sharpener, which supports a 4.0 mm file size. It provides precise sharpening for maintaining the cutting edge of chainsaw chains. Typically used by forestry professionals and DIY enthusiasts for efficient chainsaw maintenance. https://elecena.pl/product/28053453/pferd-11098040-chain-saw-sharpener-4-0-mm-ergonomic-and-efficient 2025-03-21 https://elecena.pl/product/28053453/pferd-11098040-chain-saw-sharpener-4-0-mm-ergonomic-and-efficient 2026-04-06