describe 1. Blade fixing kit, the new replacement blade fixing kit comes with 2 sizes of nuts. Engine parts for lawn mowers. 2. For STIHL brushcutters the nut sizes are M12 x 1.5 LH and M10 x 1.0 LH. Spare parts and accessories for lawn mowers. lawn mower spare parts 3. Metal blade accessory for trimmer, good replacement kit for old or damaged blades. 5pcs/set high quality replacement metal blade accessory kit for STIHL trimmers for STIHL FS55 FS56 FS120 FS130 FS130RFS200 FS200R FS250 4. The brush cutter attachment blades are made of high quality materials and can be used for a long time. 4pcs/set Lawn Mower Blade Maintenance Kit for STIHL FS120 Lawn MowersFS130 FS130R FS200 FS200R FS250 FS55. The new replacement blade accessory kit offers 2 nut sizes. Available nut sizes are M12 x 1.5 LH and M10 x 1.0 LH. A good replacement kit is available for old or damaged ones. Made from high quality materials, it can be used for a long time. Specification: material: metal. black. Size: as shown.