Durable Nylon Rods: Our chimney sweep brush is made from reinforced nylon, features high elasticity and toughness, bending up to 45°, and resisting breaks. The head of the rod is constructed of stainless steel, strong enough to withstand corrosion, and always maintains a bright surface. So it wont be broken or stuck in the pipeline during cleanings, and stills work well after long-term use. Flexible Brush Head: With a flexible brush head, this chimney sweep is effortless to rotate at high speeds. It allows you to run your drill both forward and reverse. Cleaning range: 4-12 in/10-30 cm. Besides, the brush bristle consists of strong nylon string with a special sharp-edged rectangular shape, which makes sweeping efficient. Quick Locking System: The chimney sweep kit is equipped with a detachable button locking system. This unique detail is designed to avoid loosening in any direction of rotation (clockwise or counterclockwise)