This highly polished stainless steel media is a combination of four different shapes: Balls, Crosses, Pins, & Satellite Shapes). Each does a different job in burnishing metals to a mirror bright finish in the minimum amount of time for almost all applications. Stainless steel requires only occasional cleaning and gives great uniformity. It is rust and corrosion resistant and able to handle strong compounds. To be used with Vibratory and Vibratory Tumblers.