Our disc features an extremely tough Zirconia abrasive grain. The grain remains sharp for the duration of their long life making them ideal for heavy stock removal. These multi-purpose discs can be used for grinding, deburring, edge chamfering, blending & finishing. The built-in 5/8″-11 hub eliminates the cost and weight of a traditional metal hub while the trimmable feature extends the working life of the disc allowing for fewer disc changes and longer production times.