The brush head is heat-resistant, non- and anti-aging, ensuing higher cleaning efficiency and preventing scratches of interior chimney pipe or dryer duct. Nylon rod is and flexible, curving to 90 degrees for duct work. Works perfectly with driller. Connect the driller to the rod with hexagonal adapter and then it can easily remove the stubborn debris from chimney or dryer vent through strong rotating force. Use this brush to clean the dangerous lint, dust and other pellets buildup in the dryer pipe and vent, which could improve the dryer's working performance and avoid overheating resulting in fire. Regular removal of lint is the only way to prevent dryer from catching fire. You can easily connect multiple rods to enlarge the cleaning area. Clean the duct by yourself, no more expensive professional cleaning service. Effectively cleans away the lint, dust and other debris stacked in the vent. Improves the dryer's performance and extends its lifespan. Avoids waste clogging in the pipe