General description These replacement blades are designed for use with Ryobi trimmers, specifically compatible with models RAC155, RAC157, and RAC158. Ideal for cutting thin grass and weeds, these blades are not suitable for young trees or other hard materials. Technical specifications Material: PA6 (Nylon) Length: 66 mm Quantity: 100 replacement blades Usage For optimal performance, it is recommended to soak the blades in water overnight before use to extend their lifespan. Avoid using these blades for edging, brick work, or with chains.