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 brush cutters, the nut sizes are M12 x 1.5 LH and M10 x 1.0 LH. Lawn mower spare parts and accessories. lawn mower replacement parts 3. Metal blade attachment for mower, good replacement kit for old or damaged blades. 5pcs/set high quality replacement metal blade attachment kit for STIHL mowers for STIHL FS55 FS56 FS120 FS130 FS130R FS200 FS200R FS250 4. The brush cutter attachment blades are made of high-quality materials and can be used for a long time. 5pcs/set Lawn Mower Blade Maintenance Kit for STIHL FS120 FS130 FS130R FS200 FS200R FS250 FS55 Lawn Mowers. The new replacement blade attachment kit offers 2 sizes of nuts. The available nut sizes are M12 x 1.5 LH and M10 x 1.0 LH. A good replacement kit is available for the old or damaged ones. Made of high-quality materials, it can be used for a long time. Specification: Material: Metal. Black.