Our heavier weight dryer vent and pellet vent sweeping rods. Some folks prefer these stiffer rods all the time but for most professionals their use is limited to longer vents where the stiffness allows the torque of the drill to be delivered to the tool without twisting up. Not for use in chimneys as the aluminum fittings wear quickly on steel chimney materials.
We call these "commercial" rods as they are stiff enough to spin whips and brushes in larger dryer vents up to 8-10" diameter. For vents larger than this move up to the new #7163 7/16" Slick rods.
This nylon material is workable down to 10 degrees F. For colder climates use our 3803S Slick rods. Made by us in the USA. See video below to see our patented ButtonLok fittings click together, first and still best on the market!