Features: Material: wire brushes set is made of Copper/ Steel. durable, long service life on the toughest cleaning jobs. Practical tools: these wire brushes can remove burrs, rust, dust, removing the oxide layer, scale and paint in hard to reach areas, etc. Notice :For yoursafty, male sure you wear safety glasses as well as other Protective equipment(such as long sleeve rubberized shirt and pants) while using the brushes at the first for time. Wide Application: Doing repairs, renovations and cleaning up various metal plates .The variety of brushes is terrific and work well with your drill. Strong and Durable for Light to Medium Application :These wire wheel brushes are great for removing light surfaces rust and otherwise conditioning steel and other metals. Even after use of several heads they hardly look like they have even been used. More effective than a hand-held wire brush. Specifications: Material: Copper/ Steel Size: As the Picture Show Package Includes: 36Pieces/set Wire Brushes note: Please allow 1-2cm errors due to manual measurement,Please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.