Abrasive Fast Cut Ceramic Tumbling Media - Small Cylinder Shape 3/16" x 3/8" - 2.5 LBS. Used in tumbling applications for surface and burr removal on harder metals, particularly steel. Especially effective with deburring small and intricate parts/pieces/shells. Leaves a smooth and semi-matte finish, but not polished (requires second step with non-abrasive porcelain ceramic).