Engineered for efficiency, these 1/4" depressed center grinding wheels are designed for fast stock removal and exceptional performance in metalworking applications. With a size of 4-1/2 x 1/4 x 5/8-11 and a grit rating of T27, these wheels feature a blend of A24N and A24R fast cut aluminum oxide grains, providing a soft N-grade bond for rapid material removal while ensuring a long lifespan. Capable of reaching speeds up to 13,300 RPM, they are perfect for professionals seeking reliable and effective grinding solutions. Each box contains 10 wheels, making them an ideal choice for both industrial and workshop settings.