RUTLAND Fiberglass Chimney Brush Extension Rod Kit is designed with the DIY homeowner in mind. Using 1/4 in. NPT threading to connect to a chimney brush, there are six 3 ft. rods for 18 ft. total. Attach to a RUTLAND Chimney Sweep Wire or Poly Brush to clean a chimney from the top down or up through the open fireplace. The fiberglass is flexible enough to handle slight offsets, but not enough to bend around sharp corners. for best results, clean with an up-and-down motion.