Designed for both grinding and finishing applications, these flap discs from United Abrasives are an essential tool for any metalworking professional. With a diameter of 4-1/2 inches and a grit rating of 150, they are perfect for achieving a very fine finish on a variety of materials, including ferrous and non-ferrous metals, stainless steel, and aluminum. Manufactured with durable aluminum oxide grain, these discs can withstand a maximum speed of 13,300 RPM, making them suitable for high-performance angle grinders. Each pack contains ten discs, ensuring you have plenty of supplies for your projects, whether you're blending or finishing surfaces to perfection.