【Dimension】- M6 threaded interface. Length overall 160mm / 6.30-inch, the working length of the bristles is 100mm / 3.94-inch, the working width of the bristles is 10mm / 0.39-inch. 【Material】- Wire brushes are made of Stainless Steel Wire and brush handle is made of metal metal, strong and durable, can clean rust and detail completely. 【Special design】- Innovative spiral knotted wires construction for a narrow face and precision deburring, rust, spatter and paint removal, surface conditioning and preparation. 【Application】- Great for cleaning and rust removal inside of objects such as pipes, chimney.Routine chimney cleaning helps prevent fires. 【Advantage】- Stiff copper bristles clean coal and soot from masonry flues, and chimneys,long life and durability. It won't scratch the inner surface of the chimney flue. Easy to assemble and disassemble, and you can connect chimney rods to extend your reach., Manufacturer: Utoolmart