General description Replacement blades designed for Ryobi String Trimmers, specifically compatible with models RAC155, RAC157, and RAC158. These double serrated blade heads are ideal for trimming herbs and thin brush, but should not be used on saplings or other hard materials. For optimal performance, avoid using these blades for edging or working with bricks and chains. Technical specifications Length: 6.7 cm (67 mm) Weight: 0.14 kg Material: Plastic (PA6 Nylon) Color: Yellow Quantity: 100 replacement blades Usage To enhance the longevity of the blades, it is recommended to soak them in water overnight before use. Other information