The Heavy Duty Carbon Brush Set (Thimble Type) is designed for 4-inch, 5-inch, and 7-inch grinders, ensuring superior conductivity and durability. Crafted from high-quality carbon material, these brushes provide efficient power transfer, reducing friction and motor wear for extended tool life. The thimble-type design enhances stability and contact, making it ideal for heavy-duty grinding applications. Easy to install and compatible with various grinder models, these replacement brushes are perfect for professionals and DIY users seeking optimal performance. Keep your power tools running smoothly with these reliable, wear-resistant carbon brushes.