1. Fit for your polishing need，can use for metal and nonmetal materials.2. Suitable for metal surface cleaning， derusting， grinding， dusting， deburring， polishing， stripping residueDescription:1. Material:Scouring pad2 .Diameter of Shank:3mm/0.12''3. Diameter of Brush:25mm/0.98''4. Length:45mm/1.77''