When used in a vibratory or rotary tumbling machine, the Plastic Tetrahedral Media works to remove burrs, sharp edges, and other imperfections from the surfaces of the parts, while also smoothing and polishing the surfaces to a desired finish. The unique shape of the tetrahedrons allows them to move more freely within the tumbling machine, providing more consistent and thorough coverage of the parts being finished. Plastic Tetrahedral Media is a popular choice for finishing small and intricate parts.