This brush cutter gearbox is a high-quality, brand-new gear head designed for universal use with 28 mm square spline trimmers, strimmers, and brush cutters. Made from durable, anti-rust and anti-corrosion materials with strong oxidation resistance, it offers reliable performance for domestic, commercial, or industrial applications. Easy to install and convenient to use, the gearbox securely holds the brush cutter blade or nylon head to the rotating shaft, ensuring stable operation and high reliability. It is a common and practical replacement part, making it an ideal solution for replacing worn or damaged gear heads.