Quality Materials: The grass trimmer blades are made of premium nylon. Compared with other metal blades, they are rust-resistant, durable, and easy to use. Exquisite Workmanship: Soak the blades in warm water the day before use for optimal use. The high-strength nylon replacement blades provide optimal stability, safety, and reliability. They can weed trees without cutting or damaging them. Optimal Compatibility: The plastic trimmer blade is compatible with Polycut 2-2 and Polycut 3-2 trimmers; It easily replaces the original blades. Easy to use: Our lawn mower accessories are easy to install and replace, provide excellent stability and reliability, thus improving the efficiency of the mower.