Material: The 3 toothbrush blades are made of high quality manganese steel, which is strong and durable. Surface treatment: The surface is treated with black coating, which makes the lawn mower blade anti-corrosion and rust-proof, with a smooth and delicate appearance. EASY TO USE: Easy to install and replace, good replacement for old or damaged blades. General Size: 25.4mm/1 inner diameter, suitable for all your gardening needs. Fits almost all straight shaft trimmers in the size offered. Practical: Ideal for high-density vegetation, including thick long grass, tall soft weeds and thorns, more economical and practical. Features: -The lawn mower blade is made of high-quality manganese steel with black surface treatment, which is durable, anti-corrosion and rust-proof. -Easy to replace and install. Stable characteristics and high reliability. - Ideal for trimming high-densityvegetation, including dense long grass, weeds and thorns. -Three teeth 3mm shredder blades are designed to fit any make and model. Specifications: Material: Manganese Steel Color: Black Bore Diameter: 25.4mm/1 inch Diameter: Approx. 230mm Thickness: Approx. 3mm