8’’ Rotary Weed Brush Disc Blades and the Universal Fit Adapter: Fit most of the gas or electric trimmers (Straight shaft trimmers only) with 10’’ X 1" arbor (25.4 mm) or 20 mm. For brands - Husqvarna/ Stihl/Ego/ Oregon/ Hitachi – guaranteed to fit! Premium Quality and Decent Performance – Made with fine-grade, heat and rust resistance stainless steel. When it comes to durability, our blades replacements guarantee to increase the parts’ lifecycle by at least 50%. Cuts Like Butter: Our blades are great at cutting and pruning as you don’t have to put lots of pressure during the process, unlike other brands. Our blades are also approved by the mechanic to ensure the quality meets or exceeds the OEM and they help cut through thick weeds and brush in your back yard or other landscaping jobs. U.S. Base Customer Service Team: Any questions or concerns, just drop us a line! Our US based customer service is happy to help you! Customer Trust Brand: It’s our job to make dependable and durable blades replacement and we do it right! Count on AR-PRO!