These combination grinders have a stone grinding wheel on one side of the tool and a grinding belt on the other for accomplishing a range of tasks. The wheel rotates more slowly than the belt and is suitable for shaping, sharpening, removing material, and rough finishing. The grinding belt can be used to contour edges or flatten the face of a workpiece. It can cover a larger area than the wheel and provides a smoother, more even finish. Some grinding belts can be adjusted for use in a horizontal or vertical position.