1.Efficient Cleaning: This brush set consists of a total of 6/9/12/15/18 nylon rods, 1 brush head and a hexagonal rod. The pole is 41/61 cm long, easy to disassemble and assemble. Compared to conventional cleaning, powerful cleaning can remove more dirt and the handling of all fume hoods and stainless steel cladding is much gentler. 2.Improve Efficiency: The dryer duct cleaning kit can improve the operating efficiency of your dryer, just use this brush to clean the lint and dust accumulated in your dryer vents, ducts and exhaust ports, thus improving the working performance of the dryer. 3.Fire Risk Prevention: Lint buildup can be dangerous and, if not cleaned, can cause the dryer to catch fire. Therefore, regular lint removal is the only way to prevent dryer fires. 4.Compatible Kit: The dryer duct cleaning kit can be used together with a power drill. With the help of a large rotating force, the brush bristles can remove even the most stubborn deposits in the chimney or chimney duct. And the kit helps prevent chimney fires. (Note: Electric drill is not included)