General description AlwaysH 50pcs Replacement Blades are designed for Ryobi trimmer heads, specifically compatible with models RAC155, RAC157, and RAC158. These double serrated blades are ideal for cutting grass and thin brush, providing an effective solution for maintaining your garden. However, they are not suitable for young trees or other hard materials. Technical specifications Length: 6.7 cm Width: 1.2 cm Height: 0.7 cm Weight: 0.25 kg Material: PA6 (Nylon) Color: Yellow Compatibility and accessories Compatible with Ryobi trimmer models: RAC155, RAC157, RAC158 Quantity: 50 replacement blades Usage For optimal performance, soak the blades in water overnight before use to extend their lifespan. Avoid using these blades for edging or on hard surfaces such as bricks or chains. Other information Due to manual measurement, a deviation of 1-3 cm may occur. The actual color of the item may vary slightly from the images due to different displays and lighting effects.