Flexible bristles make contour sanding a breeze. 6 inch diameter by 1/2" bore sanding wheel mounts directly to most bench grinders. Maximum sanding control is gained by hand feeding the workpiece into the sanding wheels. Designed for long life, each bristle is coated with countless aluminum oxide particles. Available in three grits to remove scratches, tool marks and machine marks. Ideal for anyone shaping and smoothing wood.