Advantage:The universal lawn mower gearbox blade nut fastener kit has exquisite workmanship, good wear resistance, stable performance, high reliability, easy installation. Material:Made of high quality metal, it is sturdy, durable, has a long service life and high reliability. Universal, suitable for most trimmers. Easy to Use:Use this attachment kit to fix the trimmer blade in the rotating position. They are a replacement to replace the head of your brush cutter gearbox. Application:The trimmer gearbox blade nut fastener kit is ideal for lawn mowers, brush cutters , grinders, etc. Material: High Quality Metal Color: Gold + Silver Size: As pictures shown. Type: Universal Trimmer Head Adapter Easy Installation: The brush cutter blade is attached to the rotary head using this attachment kit. Applicable: It fits most models, such as Stihl FS120 FS130 FS130R FS200 FS200R FS250. Package includes: 2X Protective cover 2X Plate for Blade 2X Blade 7X Threaded nut M10 LH 1. Please allow 1-2mm