30Pcs wire brushes, 3mm diameter, fit for rotary machine tools. It is used for metal and non-metal surface polishing, derusting, degreasing burr, polishing, etc. Features: Each brush is mounted to a 3mm diameter mandrel. Can remove burrs, rust, dust, removing the oxide layer. Used for metal and non-metal surface polishing, derusting, degreasing burr, polishing, etc. Suitable for the use of electric tools such as angle grinder, electric drill, special equipment and so on. Fit for your die grinder and rotary machine tools. Specifications: Material: Steel Color: Silver Package Weight: 212.5g / 7.5ounces Package Size: 120 * 120 * 40mm / 4.72 * 4.72 * 1.57in Packing List: 5 * 5mm Pencil Stainless Steel Wire Brushes 5 * 8mm Pencil Stainless Steel Wire Brushes 5 * 15mm Cup Stainless Steel Wire Brushes 5 * 25mm Cup Stainless Steel Wire Brushes 5 * 25mm Flat Stainless Steel Wire Brushes 5 * 38mm Flat Stainless Steel Wire Brushes