The Forney 60051 Mounted Grinding Wheel is 1-1/2" x 1" and made from 60 grit aluminum oxide for a lasting, efficient polish. Perfect for grinding, polishing, or deburring ferrous metals, it can be used in a 1/4" power drill and reaches speeds up to 3,450 RPMs. The small size makes it ideal for tight spaces or difficult to reach areas. Comes in a carded package.