1. ---- Made of brass and stainless steel, corrosion resistant, not easy to rust, , same effect and low cost. 2. Wide application ---- This wire brush set is suitable for polishing and grinding of most ferrous and non-ferrous metals, castings, welded joints, rivets, rust. 3. Main functions ---- This wire brush set can be used to remove burrs, rust, dust from metal surfaces, remove oxidation, scale and paint from hard-to-reach areas, etc. 4. Suitable for most hand drill machines ---- This wire brush has a 3mm rod diameter and is suitable for most hand drills, , any machine that can be fitted with a rod handle. 5. What you ---- This wire brush set includes: 12 wire brushes of 6mm diameter (6 brass brushes, 6 wire brushes), 12 wire brushes of 15mm diameter (6 brass brushes, 6 wire brushes), 12 wire brushes of 25mm diameter (6 brass brushes, 6 wire brushes). colour: black Material: brass + stainless steel Package Contents: 1 set x wire brush Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.