QualityParts From Oregon That you can depend on. This semi-automatic trimmer head is a bump and feed that replaces Stihl 25-2 Auto Cut. One of the most widely used heads by pros. While trimming, bump the head on the ground to advance line.: Head is preloaded with .095" Magnum Gatorline SuperTwist trimmer line, one of the most preferred brands of trimmer line in the market; Fits Stihl Trimmer models; FS44, FS55, FS80, FS83, FS85, FS90, FS100, FS100 RX, FS110, FS120, FS130, FS200, FS250, KM55, KM85, KM90, KM110, KM130, and FS-KM; Split spool design and Magnum Gatorline Supertwist limit reduces the chance of welding of the line; Oregon replacement parts are built to meet or exceed OEM standards. Material to stand-up to everyday wear, and eyelets to avoid line breakage. With Oregon limited-life time warranty, make a purchase knowing the company backs their products.; ; Oregon Equipment Parts 55-993 Trimmer Head Autocut Stihl 25