This is the best tool for sweeping dryers we have ever used. Easy to join rods and brush is designed to flex to the shape of the pipe. When attached to a slow drill motor, it swept the vent from bottom to top with ease and effectiveness. What helped make this task easier was that we placed a Wye connector at the bottom and attached the dryer vent pipe to one end and placed a cap on the other end of the wye. All we need to do is remove the cap and insert the brush and rods until it hit the top and also placed a vacuum at the bottom to vac the debris as it fell down. Easy and effective and no more climbing the roof or going outside to do this important task.