�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 fixing kit is ideal for lawn mowers, brushcutters, mulchers, etc.