Brush Cutter Set Size: 5mm L Key Size: 128mm/5.04" T Key Size: 140mm/5.51" Driver Plate Diameter: 80mm/3.15" Collar Nut Diameter: 25mm/0.98" , Thrust washer diameter: 42mm/1.65 inch. What you get: This cutting parts set includes 1x thrust washer, 1x bridging plate, 1x flange nut, 1x 5mm L wrench, 1x T wrench. This does exactly what it needs to do and is well constructed. Suitable replacement: This blade attachment kit is used to attach many types of blades to weed whackers, trimmers, brush cutters, string trimmers and lawn mowers. Easy to install: Replacement brush cutter adapter maintenance kit. Adapter mounting washer maintenance kit for Stihl brush cutter. Good Compatibility: Helps to install Stihl grass trimmer. Suitable for the following models: Stihl FS40C FS55R FS56R FS36 FS80 FS81 FS85 FS90 FS10 FS110 FS120 FS130 FS130R FS200 FS200R FS250 Sarlo SS-18. Specification: Condition: 100% new Material: Plastic + Steel Bridging plate diameter: 80 mm Diameter of the collar nut: 25 mm