The set consists of 4 conical brushes (75 and 100 mm in diameter), each made of carbon steel wire. Professional and durable. Our product is suitable for angle grinders with an M14 thread. Installation method: Remove the pressure plate from the angle grinder, then align the metal brush with the threaded hole, then press the spindle lock and tighten the metal brush. With this abrasive brush, you can easily remove welding slag, rust, and metal debris, etc. Save money and time. From design to development, our product has been carefully engineered to improve its lifespan.