Engineered for exceptional performance, the Maxidiscâ„¢ EXV Zirconia Standard flap discs from Pearl Abrasive are designed to tackle a variety of metalworking tasks with ease. Measuring 4-1/2 inches in diameter and featuring a robust 7/8" arbor bore, these discs are ideal for medium to heavy stock removal on ferrous metals, including iron, steel, and stainless steel. With a grit rating of 40, they excel in applications such as weld bead removal, deburring, and blending, ensuring a smooth finish on metal surfaces. Each box contains 10 discs, making them a practical choice for both professional and DIY projects, while their ability to withstand speeds up to 13,300 RPM ensures durability and efficiency in demanding environments.