Mothers PowerBall Mini MD The PowerBall Mini MD allows you to safely and easily remove tough scratches and stains from your vehicles polished aluminum and stainless steel parts with speed and confidence Special grade of foam is designed specifically for uncoated metals The polishing ball works with your electric drill to provide consistent, fast polishing action Mothers PowerBall Mini MD should be used only on uncoated metals 3 inches in diameter, 10 inch extension