The 3-tooth weeder blade fits the Stihl, Echo 1 (25.4mm) or 20mm shaft. lawn mower blade adapter spare parts as follows: thrust washer: 4130-713-1600; jumper plate: 4126-713-3100; collar nut: 4126-642-7600. 3.3 Tooth Brush Cutter Blade Fits: Stihl FS120 FS130 FS130R FS200 FS200R FS250 String Trimmer. Perfect kits for your Stihl trimmer. The 10 inch brush cutter blade is ideal for weed eaters, wacker, edging, weed cutting, brush cutter attachment. Package included 1 x Trimmer Brush Cutter Blade + 1 x Thrust Washer + 1 x Jumper Plate and 1 x Collar Nut + 1 x Screwdriver.