Premium Aluminum Oxide Fiber Disc Spindles – 4-1/2" x 7/8", 50 Grit

This 4-1/2" fiber disc features premium heat-treated Aluminum Oxide grain electrostatically coated onto a heavy-duty vulcanized fiber backing for durability and consistent performance. The 50-grit construction provides aggressive material removal while still delivering a relatively smooth finish and maintaining cool cutting action on steel. Rated for a maximum speed of 13,300 RPM, this disc is ideal for industrial, fabrication, and metalworking applications requiring long-lasting, high-performance grinding.